How many months and are you coming back to live in the same room?

For just a few months if coming back to live there after I'd just pay the rent and leave my stuff in place. Unless you know someone you can trust who wants to sublet for that time period, finding a responsible tenant to sublet to can be difficult and if they wind up trashing the place you may wind up paying more than the rent you collected from your tenant.

If moving to somewhere else when you come back, I'd try to get out of the lease and move my stuff out. If storing the stuff I'd prefer to leave it with friends or family as a first choice, or use a storage facility as a second choice. Also I'd probably use it as an opportunity to get rid of anything that I wasn't really attached to.