Jerome is set to undergo surgery on a hernia, while Preston defender Billy Jones (hamstring) and Michael Kightly from Wolves (foot) have not joined up with the squad either.
Under-21 coach Stuart Pearce has called up Leicester duo Joe Mattock, 17, and Richard Stearman, 20.
Copyright (c) PA Sport 2007, All Rights Reserved.
Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: https://www.givemesport.com/writeforgms