Move to a previous step in a process

I'm creating a process in a Change Catalog and have a step for approval after a series of tasks. Is it possible to go back to a previous task in the process if the approval is declined?

I'd like to send a notification to the assignee of the change telling them that the approval was denied, then simply mark a previous task (or set of tasks) as not completed and move back to that task in the process. Seems like a very logical thing to do after an approval step, but it doesn't look to be possible (or at least not easily.)