In August, the former England and Chelsea left-back was appointed as one of Lee Carsley's assistants.
England coach Ashley Cole will step down from his role at Birmingham City imminently.AdvertisementAdvertisementHe was part of the coaching staff for their Nations League wins against Ireland and Finland.
Now The Athletic has revealed that Carsley wants to ensure Cole has more time to focus on England duties.
The ex-defender has agreed that he will move on from Birmingham, where he has served under four managers already.
He has worked under Wayne Rooney, Tony Mowbray, Gary Rowett and Chris Davies at the League One club.