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  <xsd:element id="buse_WealthManagementSegmentMember" name="WealthManagementSegmentMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_DeferredTaxAssetsPurchaseAccountingAdjustments" name="DeferredTaxAssetsPurchaseAccountingAdjustments" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
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  <xsd:element id="buse_TreasuryStockPolicyPolicyTextBlock" name="TreasuryStockPolicyPolicyTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="buse_AmortizationOfMortgageServicingRights" name="AmortizationOfMortgageServicingRights" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="buse_BusinessCombinationSharesReceived" name="BusinessCombinationSharesReceived" nillable="true" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="buse_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherBorrowings" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherBorrowings" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="buse_OneMonthLondonInterbankOfferedRateLiborMember" name="OneMonthLondonInterbankOfferedRateLiborMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_NoninterestExpensesMember" name="NoninterestExpensesMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_ScheduleOfSecuritiesFinancingTransactionsAndShortTermDebtTableTextBlock" name="ScheduleOfSecuritiesFinancingTransactionsAndShortTermDebtTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="buse_DepositsInterestBearingTransactionDepositsSavingDepositsAndMoneyMarketDeposits" name="DepositsInterestBearingTransactionDepositsSavingDepositsAndMoneyMarketDeposits" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="buse_EffectiveIncomeTaxRateReconciliationIncomeBankOwnedLifeInsurance" name="EffectiveIncomeTaxRateReconciliationIncomeBankOwnedLifeInsurance" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="buse_OtherServicingAssetAtFairValueAmount" name="OtherServicingAssetAtFairValueAmount" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="buse_InterestBearingTransactionDeposits" name="InterestBearingTransactionDeposits" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="buse_MaximumOfHoldingCompaniesAssetsRetained" name="MaximumOfHoldingCompaniesAssetsRetained" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="buse_RestrictedStockUnitsAndDeferredStockUnitsMember" name="RestrictedStockUnitsAndDeferredStockUnitsMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_BankPropertyHeldForSaleFairValueDisclosure" name="BankPropertyHeldForSaleFairValueDisclosure" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="buse_AppraisalOfCollateralOrRealEstateListingPriceValuationTechniqueMember" name="AppraisalOfCollateralOrRealEstateListingPriceValuationTechniqueMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_BankPropertyHeldForSaleMember" name="BankPropertyHeldForSaleMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_BrokeredSavingDepositsAndMoneyMarketDeposits" name="BrokeredSavingDepositsAndMoneyMarketDeposits" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="buse_BrokeredTimeDeposits" name="BrokeredTimeDeposits" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="buse_DirectorsAndAdvisoryDirectorsMember" name="DirectorsAndAdvisoryDirectorsMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_TermLoanMember" name="TermLoanMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedMortgageServicingRights" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedMortgageServicingRights" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="buse_DeferredTaxLiabilitiesDeferredExpenseDeferredLoanOriginationCosts" name="DeferredTaxLiabilitiesDeferredExpenseDeferredLoanOriginationCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="buse_StockIssuedSharesStockOptionsExercisedNetOfTaxBenefitExpense" name="StockIssuedSharesStockOptionsExercisedNetOfTaxBenefitExpense" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="buse_OtherThanTemporaryImpairmentSecurityPortfolio" name="OtherThanTemporaryImpairmentSecurityPortfolio" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <xsd:element id="buse_OperatingLeasePaymentsFixedPayment" name="OperatingLeasePaymentsFixedPayment" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="buse_OperatingLeasePaymentsLiabilityReduction" name="OperatingLeasePaymentsLiabilityReduction" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="buse_AmortizationOfDiscountOnFederalHomeLoanBankAdvances" name="AmortizationOfDiscountOnFederalHomeLoanBankAdvances" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="buse_TransferOfInvestmentSecuritiesHeldToMaturityToAvailableForSale" name="TransferOfInvestmentSecuritiesHeldToMaturityToAvailableForSale" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="buse_GainLossOnLifeInsuranceProceeds" name="GainLossOnLifeInsuranceProceeds" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="buse_LongTermDebtExcludingSeniorNotesSubordinatedNotesAndJuniorSubordinated" name="LongTermDebtExcludingSeniorNotesSubordinatedNotesAndJuniorSubordinated" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="buse_DerivativeSwapTypeVariableRate" name="DerivativeSwapTypeVariableRate" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="buse_InterestRateLockCommitmentsAndForwardSalesCommitmentsMember" name="InterestRateLockCommitmentsAndForwardSalesCommitmentsMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_SecondAmendmentToRevolvingCreditFacilityMember" name="SecondAmendmentToRevolvingCreditFacilityMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_DeferredTaxAssetsLeaseLiabilities" name="DeferredTaxAssetsLeaseLiabilities" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="buse_DeferredTaxLiabilitiesUnrealizedGainsOnEquitySecurities" name="DeferredTaxLiabilitiesUnrealizedGainsOnEquitySecurities" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="buse_OtherRealEstateCashPaymentsCollected" name="OtherRealEstateCashPaymentsCollected" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="buse_AccretionOfPremiumsAndDiscountsOnTimeDeposits" name="AccretionOfPremiumsAndDiscountsOnTimeDeposits" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="buse_GainsLossesOnSalesOfOtherRealEstateExcludingAllowance" name="GainsLossesOnSalesOfOtherRealEstateExcludingAllowance" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="buse_SalesOfOreo" name="SalesOfOreo" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="buse_FinancingReceivableCreditQualityIndicatorsByOriginationTableTextBlock" name="FinancingReceivableCreditQualityIndicatorsByOriginationTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="buse_CollateralDependentLoans" name="CollateralDependentLoans" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
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  <xsd:element id="buse_CapitalizedExpendituresOnOtherRealEstateOwned" name="CapitalizedExpendituresOnOtherRealEstateOwned" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="buse_PaycheckProtectionProgramMember" name="PaycheckProtectionProgramMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_June12030MaturityMember" name="June12030MaturityMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_May252022MaturityMember" name="May252022MaturityMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_May252027MaturityMember" name="May252027MaturityMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_FixedToFloatingRateNotesDue2030Member" name="FixedToFloatingRateNotesDue2030Member" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_FinancingReceivableAmortizedCostCaresAct" name="FinancingReceivableAmortizedCostCaresAct" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="buse_FinancingReceivableFeesCaresAct" name="FinancingReceivableFeesCaresAct" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="buse_FinancingReceivableLoanOriginationCostsCaresAct" name="FinancingReceivableLoanOriginationCostsCaresAct" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="buse_The2020EquityIncentivePlanMember" name="The2020EquityIncentivePlanMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_PercentageOfRemainingLoanMaintainsGovernmentGuarantee" name="PercentageOfRemainingLoanMaintainsGovernmentGuarantee" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <xsd:element id="buse_ManagementViceChairmanOfBoardMember" name="ManagementViceChairmanOfBoardMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_GainLossOnSaleOfLoansNet" name="GainLossOnSaleOfLoansNet" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="buse_InterestRateAxis" name="InterestRateAxis" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_InterestRateDomain" name="InterestRateDomain" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodValue" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="buse_DurationOfFixedInterestRate" name="DurationOfFixedInterestRate" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="buse_DebtInstrumentFixedPaymentTerm" name="DebtInstrumentFixedPaymentTerm" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="buse_DerivativeGainLossesOnDerivativePayFloatingReceiveFixed" name="DerivativeGainLossesOnDerivativePayFloatingReceiveFixed" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="buse_DerivativeGainLossesOnDerivativePayFixedReceiveFloating" name="DerivativeGainLossesOnDerivativePayFixedReceiveFloating" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="buse_NatureOfOperationsPolicyTextBlock" name="NatureOfOperationsPolicyTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
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  <xsd:element id="buse_FederalFundsMaturityPeriod" name="FederalFundsMaturityPeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="buse_ScheduleOfUnamortizedDebtIssuanceCostTableTextBlock" name="ScheduleOfUnamortizedDebtIssuanceCostTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="buse_GainLossOnSaleOfMortgageLoansMember" name="GainLossOnSaleOfMortgageLoansMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_InterchangeExpense" name="InterchangeExpense" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="buse_ProceedsFromFinancingReceivableForgiveness" name="ProceedsFromFinancingReceivableForgiveness" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="buse_FinancingReceivableForgivenessApplicationAmount" name="FinancingReceivableForgivenessApplicationAmount" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="buse_DeferredTaxLiabilitiesUnrealizedGainsOnSecuritiesAvailableForSaleAndCashFlowHedges" name="DeferredTaxLiabilitiesUnrealizedGainsOnSecuritiesAvailableForSaleAndCashFlowHedges" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="buse_NetInterestIncomeForFeesNetOfDeferredCost" name="NetInterestIncomeForFeesNetOfDeferredCost" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="buse_BusinessCombinationSpecialCashDividend" name="BusinessCombinationSpecialCashDividend" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="buse_FinancingReceivablePriorLoans" name="FinancingReceivablePriorLoans" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="buse_MarketBasedPerformanceStockUnitsMember" name="MarketBasedPerformanceStockUnitsMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_InterestRateSwapsPayFloatingReceiveFixedMember" name="InterestRateSwapsPayFloatingReceiveFixedMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_InterestIncomeExpenseTradingLiabilities" name="InterestIncomeExpenseTradingLiabilities" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="buse_ScheduleOfLeaseRelatedBalancesTableTextBlock" name="ScheduleOfLeaseRelatedBalancesTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="buse_EmployeeStockPurchasePlan2021Member" name="EmployeeStockPurchasePlan2021Member" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_NotesPayableFhlbResidentialAndCommercialRealEstateLoansAndFhlbStockMember" name="NotesPayableFhlbResidentialAndCommercialRealEstateLoansAndFhlbStockMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndOutstanding" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndOutstanding" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <xsd:element id="buse_ShortTermLoanMember" name="ShortTermLoanMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_AcceleratedVestingProvisionMinimumRequisiteServicePeriod" name="AcceleratedVestingProvisionMinimumRequisiteServicePeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="buse_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndOutstandingWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndOutstandingWeightedAverageGrantDateFairValue" nillable="true" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <xsd:element id="buse_EmployeeStockPurchasePlanSharesMember" name="EmployeeStockPurchasePlanSharesMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_InterestRateSwapsPayFixedReceiveFloatingMember" name="InterestRateSwapsPayFixedReceiveFloatingMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_RateModificationMember" name="RateModificationMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_PaymentModificationMember" name="PaymentModificationMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_DerivativeMaturedAmount" name="DerivativeMaturedAmount" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element name="CumminsAmericanCorpMember" id="buse_CumminsAmericanCorpMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="Covid19LoanModificationsMember" id="buse_Covid19LoanModificationsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="FullPaymentDeferralMember" id="buse_FullPaymentDeferralMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="InterestOnlyDeferralsMember" id="buse_InterestOnlyDeferralsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="BlendedPrincipalAndInterestAndInterestOnlyDeferralsMember" id="buse_BlendedPrincipalAndInterestAndInterestOnlyDeferralsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MortgageAndPersonalLoanDeferralsMember" id="buse_MortgageAndPersonalLoanDeferralsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PurchasedHomeEquityLineOfCreditPoolDeferralsMember" id="buse_PurchasedHomeEquityLineOfCreditPoolDeferralsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="BenefitPlanExpensesAbstract" id="buse_BenefitPlanExpensesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="FirstechMember" id="buse_FirstechMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="GlenviewIllinoisMember" id="buse_GlenviewIllinoisMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NorthbrookIllinoisMember" id="buse_NorthbrookIllinoisMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NumberOfOfficeBuildings" id="buse_NumberOfOfficeBuildings" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ScheduleOfFinancingReceivableTroubledDebtRestructuringModificationsUnderCaresActTableTextBlock" id="buse_ScheduleOfFinancingReceivableTroubledDebtRestructuringModificationsUnderCaresActTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="LeaseDisclosureTextBlock" id="buse_LeaseDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NumberOfRiskParticipantAgreement" id="buse_NumberOfRiskParticipantAgreement" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="ShareBasedCompensationDiscountToMarketPricePercent" id="buse_ShareBasedCompensationDiscountToMarketPricePercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="FeesNetOfDeferredCostsRemainingToBeRecognized" id="buse_FeesNetOfDeferredCostsRemainingToBeRecognized" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="UnfundedInvestmentsMember" id="buse_UnfundedInvestmentsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="FundedInvestmentsMember" id="buse_FundedInvestmentsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="FairValueAdjustmentWeightedAverageRemainingLifeBalance" id="buse_FairValueAdjustmentWeightedAverageRemainingLifeBalance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
</xsd:schema>
