Farry had been on a medically prescribed drug, used to treat a wrist injury 20 days earlier.
At present there is no definitive drugs policy for golf sanctioned by the Royal & Ancient Golf Club of St Andrews (R&A) or the United States Golf Association (USGA), the ruling bodies for golf.
In Marcs case, Marc has been on a medically prescribed drug that has a trace of a banned substance ' Prednisolone ' of which he was unaware, stated David Garland, director of tour operations for The European Tour.
Farry said he expects to be exonerated by the French Federation and is scheduled to meet the Federation on Sept. 15.
He added: The other five golfers tested at the Open de France ' Philip Golding, David Howell and Peter OMalley, who finished first, second and third respectively - along with Francois Delamontagne and Graeme McDowell - were clear.'