Suspensions are issued to players who have violated the rules, such as inappropriate behavior or cheating. If an account is currently suspended, a player is unable to queue up or play in any matches on his or her current rosters. Once suspension has ended, a player is permitted to participate in official tournament matches.
If you are curious as to why you received a suspension, please reach out to your team administrator. Check your email for a suspension notification if you are on a free agent team.