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.
In case of repeated cautions:
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in the qualifying competition, players and team officials are suspended for the next competition match after the third, fifth and any subsequent caution;
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in the final tournament, players and team officials are suspended for the next competition match after two cautions and any subsequent even-numbered caution.
Cautions that have not resulted in a suspension and pending yellow-card suspensions expire on completion of the qualifying competition. They are not carried forward to the final tournament.
Cautions from matches in the final tournament that have not resulted in a suspension expire on completion of the quarter-finals. They are not carried forward to the semi-finals or any Olympic play-off match.
Cautions and pending yellow-card suspensions from the final tournament expire at the end of the competition.