Jallet was forced off early during PSG's 1-1 Champions League draw with Valencia on Wednesday night and although Ancelotti said that the groin injury was "minor" the player would likely sit out at the weekend.
"Christophe sustained a minor groin injury," UEFA.com quotes Ancelotti as saying.
"It's the reason why he was rested last weekend. It's nothing serious, but I don't think he will be available on Saturday."
PSG are currently two points ahead of Lyon at the top of Ligue 1.