Traditionally too many yellow cards accrued means a one-game suspension. According to UEFA, article 52, a player is suspended for the next match after picking up two yellow cards in separate games. The rules for the tournament do however state that yellow cards have a reset button also, just like the Premier League. This is intentionally done by the tournament organisers after several top stars missed finals in the past due to picking up yellow cards in the last four. All yellow cards and suspensions will expire upon the completion of the tournament.
Source: Daily Mirror June 07, 2021 15:30 UTC