Dindane has attracted interest from numerous Premier League clubs, with Aston Villa and Stoke City also reportedly chasing the powerful Ivorian striker.
Martel says that his Ligue 2 outfit will not be able to hang on to the 28-year-old for much longer and expressed his regret that he will be leaving France.
"Aruna Dindane is a world class player, there are clubs abroad interested in him," he told Sport10.
"I think he will leave and join a foreign club. It is sad because many French clubs can't afford him."
Dindane has stated his desire to play in England before but, according to reports form the Ivory Coast, could end up heading to La Liga if his agent cannot complete a deal by the end of June.