NOTE: Only Admin, Process admin, and the owner can delete the BPMN diagrams in the Processes
To delete a BPMN diagram:
Open the Process Browser tab.
Search the business process in the list where the diagram is located and open it.
Under the Diagrams section, click three dots in the right corner and select Delete.
Once confirmed, the diagram is removed from the list.
NOTE: At the moment, it is not possible to unpublish a process diagram, but you can replace or update the published diagram. Refer to Update the Published Process for more information.