The Brazil international was booked minutes after being a substitute in Wednesday’s penalty win over Montpellier HSC in the semi-final.
Neymar, 29, scored on the spot as PSG progressed 6-5 after a 2-2 draw in regulation time when Kylian Mbappe scored twice for Mauricio Pochettino’s men.
The reason for the ban on the FFF is a pre-existing suspended sentence and it is still possible that PSG will try to appeal in order to either completely overturn the decision or to freeze the sanction and thus release him for the flagship event of the Stade de France next week.
Neymar, who recently extended his contract at Parc des Princes until 2025 with an option of an additional year before declaring his desire to play alongside Cristiano Ronaldo, appeared to express his frustration with the rules via social media.
Presnel Kimpembe is also suspended for PSG while Marco Verratti is injured for the rest of the season as the Parisians aim to recover silverware from a campaign that promised a historic treble until their recent exit from UEFA Champions League against Manchester City.
Lille OSC leads the race for Ligue 1 by three points with two games to go and PSG will face Stade de Reims and Stade Brestois 29 in their final matches.