<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-08-26</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0001139163</issuerCik><issuerName>JCM PARTNERS LLC</issuerName>        <issuerTradingSymbol>JCMP</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001254230</rptOwnerCik><rptOwnerName>DEPPE FRANK</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>P. O. BOX 3000</rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>CONCORD</rptOwnerCity><rptOwnerState>CA</rptOwnerState><rptOwnerZipCode>94522-3000</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>1</isOther><otherText>Manager</otherText></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Class 1 Units</value><footnoteId id="F1" /></securityTitle><transactionDate><value>2003-08-26</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>P</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>15794</value></transactionShares><transactionPricePerShare><value>1.3</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>657196</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>By Frank Deppe Restated Trust</value></natureOfOwnership></ownershipNature></nonDerivativeTransaction><nonDerivativeTransaction><securityTitle><value>Class 1 Units</value><footnoteId id="F1" /></securityTitle><transactionDate><value>2003-08-26</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>P</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>72076</value></transactionShares><transactionPricePerShare><value>1.32</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>729272</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>By Frank Deppe Restated Trust</value></natureOfOwnership></ownershipNature></nonDerivativeTransaction><nonDerivativeHolding><securityTitle><value>Class 1 Units</value></securityTitle><postTransactionAmounts><sharesOwnedFollowingTransaction><value>1391993</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>By Bernice G. Deppe Restated Trust</value></natureOfOwnership></ownershipNature></nonDerivativeHolding></nonDerivativeTable><footnotes><footnote id="F1">The 729,272 Class 1 Units beneficially owned gives effect to two separate transactions that occurred on 8/26/03.</footnote></footnotes><remarks></remarks><ownerSignature><signatureName>/s/ Frank Deppe by Gayle M. Ing, as Attorney-in-Fact</signatureName><signatureDate>2003-08-28</signatureDate></ownerSignature></ownershipDocument>

