The wing-back is a target for Leicester City, amid reports of a bid already being tabled by the Foxes.
After their 3-0 win at Rennes, Garcia was asked about Sarr and declared: "Bouna produced a very good performance.
"He must not relax. He is 100% OM. If he succeeds, it will be in that position. He must continue to learn and can be very satisfied.
"Leicester? I did not hear about it. Bouna Sarr, there was never any question that he leaves."