UEFA has imposed a three-month Champions League ban on Roma president James Pallotta for his critical comments about referee decisions after the team's semifinal defeat to Liverpool in May.

UEFA said the American official is suspended "from carrying out his function," including communicating with players or coaches during the game.

Pallotta also cannot enter the dressing room or tunnel before or during games.

Roma president James Pallotta was critical of the officiating in the Champions League. Silvia Lore/NurPhoto via Getty Images

The ban will start with Roma's first Champions League game, on Sept. 18 or 19, and will continue through the entire group stage.

Pallotta's improper conduct charge related to comments such as it being "an absolute joke" UEFA did not have video review of key incidents.

UEFA also fined Roma €19,000 for for a range of charges including fans at Stadio Olimpico throwing fireworks.