This code system http://hl7.org/fhir/conditional-delete-status defines the following codes:

CodeDisplayDefinition
not-supportedNot SupportedNo support for conditional deletes.
singleSingle Deletes SupportedConditional deletes are supported, but only single resources at a time.
multipleMultiple Deletes SupportedConditional deletes are supported, and multiple resources can be deleted in a single interaction.