Not available at this time. Deleted folder (or trash) is not even available to move items to.
I asked someone at Blackberry about it, and they are revisiting how this currently works. Not sure when or if they will change it, but last I heard they were going to find away to stop the 'hard deletes'
For now it is safest to move items to another folder rather than delete, I have a folder called 'deleted from zed' that I dump things into. I have 'show filed messages' turned off so that I don't see then on the z10.
-: DrewRead :- Can't find an app on Blackberry World yet? Tweet the developer and ask when they will #GetWithBB10 !! "Like it" if you like it.