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<!-- DFIN ActiveDisclosure(SM) XBRL Schema Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2021-04-28T18:16:51.6081718+00:00 -->
<!-- Version            : 5.0.1.615 -->
<!-- Package ID         : 7dc449d06fd645cd955f1d8793799c17 -->
<!-- Copyright (c) 2021 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
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  <xsd:element id="sitc_OtherAssetsExcludingIntangibleAssetsAbstract" name="OtherAssetsExcludingIntangibleAssetsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sitc_LeaseOriginationCostsMember" name="LeaseOriginationCostsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sitc_AmortizationOfIntangibleAssetsExcludingAboveAndBelowMarketLeases" name="AmortizationOfIntangibleAssetsExcludingAboveAndBelowMarketLeases" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="sitc_LineOfCreditFacilityScheduledMaturityDate" name="LineOfCreditFacilityScheduledMaturityDate" type="xbrli:gYearMonthItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="sitc_JPMorganChaseBankNaAndWellsFargoBankNaMember" name="JPMorganChaseBankNaAndWellsFargoBankNaMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sitc_PNCBankNAMember" name="PNCBankNAMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sitc_AccordionFeature" name="AccordionFeature" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sitc_LineOfCreditFacilityOptionsToExtendedMaturityDate" name="LineOfCreditFacilityOptionsToExtendedMaturityDate" type="xbrli:gYearMonthItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="sitc_LineOfCreditFacilityCompetitiveBidOptionOnPeriodicInterestRates" name="LineOfCreditFacilityCompetitiveBidOptionOnPeriodicInterestRates" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="sitc_RevolvingCreditFacilityMaturityExtensionOption" name="RevolvingCreditFacilityMaturityExtensionOption" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="sitc_JPMorganChaseBankNaWellsFargoBankNaCitizensBankNaRBCCapitalMarketsAndUSBankNationalAssociationMember" name="JPMorganChaseBankNaWellsFargoBankNaCitizensBankNaRBCCapitalMarketsAndUSBankNationalAssociationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sitc_GuarantyOfBorrowingCapacityToAffiliate" name="GuarantyOfBorrowingCapacityToAffiliate" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sitc_ImpairmentChargesIncludingDiscontinuedOperationsAndInvestment" name="ImpairmentChargesIncludingDiscontinuedOperationsAndInvestment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="sitc_ImpairedLongLivedAssetsHeldAndUsedFairValueDisclosure" name="ImpairedLongLivedAssetsHeldAndUsedFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="sitc_ImpairmentOfConsolidatedAssetsMember" name="ImpairmentOfConsolidatedAssetsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sitc_IndicativeBidsMember" name="IndicativeBidsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sitc_FairValueInputsRate" name="FairValueInputsRate" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="sitc_FairValueInputsWeightedAverageRate" name="FairValueInputsWeightedAverageRate" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="sitc_NetIncomeLossAttributableToCommonShareholdersAfterAllocationToParticipatingSecurities" name="NetIncomeLossAttributableToCommonShareholdersAfterAllocationToParticipatingSecurities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sitc_MarkToMarketAdjustment" name="MarkToMarketAdjustment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sitc_PerformanceRestrictedStockUnitsMember" name="PerformanceRestrictedStockUnitsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sitc_PerSharePriceOfDepositaryShare" name="PerSharePriceOfDepositaryShare" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="sitc_RedeemablePreferredStockDividendPerShareProratedToRedemptionDate" name="RedeemablePreferredStockDividendPerShareProratedToRedemptionDate" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="sitc_RedeemablePreferredStockDividendPerDepositaryShareProratedToRedemptionDate" name="RedeemablePreferredStockDividendPerDepositaryShareProratedToRedemptionDate" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="sitc_ClassKCumulativeRedeemablePreferredSharesMember" name="ClassKCumulativeRedeemablePreferredSharesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
</xsd:schema>
