The 28-year-old was substituted after 28 minutes of PSG's 2-0 win over Istanbul Basaksehir in the UEFA Champions League on Thursday (AEDT).
From Sunday (AEDT), PSG has three games in a week before the international break, as it faces Nantes and Rennes in Ligue 1 either side of a UEFA Champions League trip to RB Leipzig.
"We are sad. He has a small injury to the adductor. He will be back after the [international] break," PSG head coach Tuchel said.
"I think he cannot play for Brazil. If he plays all the matches it means that he is not injured, but he is. The information is that he will return after the break."
Brazil faces Venezuela on 14 November (AEDT) and then plays Uruguay four days later.