The criteria for putting a permit on hold are very narrow: being sent to work abroad by your Swiss employer, military service or further education. Only these reasons are given in the Foreign Nationals Act. Anything else tends to start at a default “no” position so you have to make a REALLY good case to get a “yes”.
It should be straightforward, especially if you’re returning to the same canton. If not, there may need to be correspondence between you and the canton/s to get the C permit issued in a new canton.