The Saudi Arabian Football Federation said on its Twitter account that Al-Mirdasi was under "administrative investigation" but did not specify the nature of the probe.
A source close to the Saudi Arabia Football Federation told Reuters a disciplinary hearing would be held on Monday, with Al-Mirdasi accused of asking one of the teams playing in the King's Cup final for money.
A decision is expected to be announced later on Monday.
Al-Mirdasi was selected for last year's Confederations Cup in Russia, a warmup for the June 14-July 15 World Cup.
(Reporting by Ian Ransom and Michael Church; Editing by John O'Brien)
