They said in the episode he had gone back to England. Tom Felton is not returning to the show. At least not soon.

Thanks!

his character was annoying af. kinda was just used for flashpoint. Now that that story is over, no need to keep em

Stroke of my luck...my two favorite characters from last season were H.R. and Julian. I didn't mind how they informed us about why Julian is not on the show anymore. His entire existence from last season is wrapped up in one line by Joe, but at least they acknowledged him and didn't try to pull a Chuck Cunningham.