Daily sports newspaper L'Equipe reported on Sunday that Mbappe participated in the collective session although he did not stay with the squad the whole time.
Mbappe picked up a hamstring injury on February 1 and PSG said he would be ruled out of action for three weeks.
Coach Christophe Galtier (56) on Saturday said he would take 'zero risk' with Mbappe.
PSG have been in poor form recently, losing 3-1 at Monaco in Ligue 1 on Saturday for their fourth defeat of the year in all competitions.