Neymar was forced off with injury after an hour during PSG's French Cup victory over Caen on Wednesday evening - just six days before his side's Champions League clash with Barcelona.
The Brazil forward - who has 13 goals in 17 appearances in all competitions this season - is due to face his former side Barcelona on Tuesday 16 February in the first leg of the pair's Champions League last 16 tie. No time scale has yet been given for his return.
As reported by journalist Jonathan Johnson, Neymar went down with a left adductor problem on the 60 minute mark with PSG leading 1-0. He was replaced by Kylian Mbappe, before heading straight down the tunnel towards the dressing room.
Despite Neymar's absence for the final half an hour, PSG ran out 1-0 winners over Caen thanks to Moise Kean's 49th minute effort.
PSG play Nice in Ligue 1 on Saturday 13 February, before the trip to Camp Nou to face Barcelona three days later. Their last 16 second leg against Ronald Koeman's side at the Parc des Princes is not until 10 March.
Neymar has been prolific in the Champions League this season, netting six goals in five appearances.