A CMMN Stencil
In Visio Pro for O365, search for CMMN and see the Online results.
Hi, a stencil for CMMN (case management model and notation) would be fine for modeling business processes
Christian Fillies commented
Case Management Model and Notation (CMMN)
We got increasing request on Shapes for Case Management. It is a kind of extension to BPMN
Hi Can you please elaborate what you mean. It will be helpful for others to vote if they can understand your idea better.