Pakistan leg spinner Danish Kaneria has been refused clearance from the country's cricket board to join the squad in Dubai for the Test series against South Africa.
"He has not been cleared and we have nothing more to say," Zakir Khan, Pakistan's director of international operations, said.
Kaneria was due to leave with a batch of four other players on Sunday to join the squad for the two Tests starting from November 12.
"I don't know what has happened," Kaneria said. "I just got a call from a board official saying I shouldn't go to the airport."
Kaneria, who has taken 261 wickets in 61 Tests, was cleared in September of betting during an English county match last season.
Pakistan cricket was hit by spot-fixing allegations during their tour of England this year. Three players -- Test captain Salman Butt and bowlers Muhammad Amir and Mohammad Asif -- were provisionally suspended by the International Cricket Council.
Scotland Yard and the ICC anti-corruption unit are investigating the case.