French jockey Olivier Doleuze has tested positive for a banned substance and will miss Sunday's $2.2 million Singapore Airlines International Cup.

Doleuze, who had been due to ride fancied Balius in the city-state's biggest race of the year, provided a urine sample that contained a prohibited substance after a race meeting at Happy Valley on Wednesday, the Hong Kong Jockey Club revealed.

"The racing stewards have exercised the powers they have .... and have decided to stand jockey Doleuze down from riding until an inquiry into the regularity has been determined," it said in a statement.

36-year-old Doleuze, who has more than 700 career wins, was also due to ride Sanziro in the KrisFlyer International Sprint later on Sunday.