As a rule, a player or team official sent off by the referee is automatically suspended for the next match in the competition. In the event of a serious offence, the UEFA disciplinary bodies are entitled to augment this punishment, including by extending it to other competitions.
During the league phase, players and team officials are suspended for the next competition match after two yellow cards and any subsequent even-numbered yellow card (e.g. fourth, sixth).
Yellow cards that have not resulted in a suspension and pending yellow-card suspensions expire on completion of the quarter-finals.
All yellow cards and pending yellow-card suspensions expire at the end of a team's involvement in the competition.