Ambrose joins Kris Commons in being omitted from the current list of players available for the play-off against Israel's Hapoel Be'er Sheva.
The 27-year-old's mistake led to Lee Casciaro's winner as Celtic fell to a shock 1-0 defeat by Lincoln Red Imps in their opening qualifier.
He was dropped for the second leg but returned amid a defensive injury crisis for the 1-1 away draw with Astana in the following round.
But the error-prone defender is moving further away from Celtic's first team and has lost his place as goalkeeper Dorus de Vries comes in following his move from Nottingham Forest.
Centre-backs Dedryck Boyata and Erik Sviatchenko are included as they seek to make comebacks following injury.
Commons has returned to training after back surgery but has not featured under Brendan Rodgers.
Source : PA
Source: PA