<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2025-11-18</periodOfReport>

    <dateOfOriginalSubmission>2025-11-19</dateOfOriginalSubmission>

    <issuer>
        <issuerCik>0001494891</issuerCik>
        <issuerName>Sensus Healthcare, Inc.</issuerName>
        <issuerTradingSymbol>SRTS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001720602</rptOwnerCik>
            <rptOwnerName>Sardano Michael</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>851 BROKEN SOUND PARKWAY NW</rptOwnerStreet1>
            <rptOwnerStreet2>STE. 215</rptOwnerStreet2>
            <rptOwnerCity>BOCA RATON</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33487</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>true</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle>PRESIDENT AND GENERAL COUNSEL</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>spouse</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Shares held by the reporting person's spouse, as to which the reporting person disclaims beneficial ownership.</footnote>
        <footnote id="F2">On November 19, 2025, the reporting person filed a Form 4 which inadvertently reported that the reporting person did not indirectly own any shares of the issuer's common stock. In fact, as reported in this amendment, the reporting person's spouse holds 1,000 shares of the issuer's common stock.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Michael Sardano</signatureName>
        <signatureDate>2025-12-16</signatureDate>
    </ownerSignature>
</ownershipDocument>
