The 25-year old winger, who spent time with Leeds United recently, called his retirement from the game in February after publicly stating he is gay but Schelotto has urged him to get back into the sport he loves so much.
"I was surprised that he left the game because I know that he enjoyed playing soccer," Barros Schelotto told FutbolMLS.com.
"Whatever his life and his way of living, it has nothing to do with leaving the game.
"I think it's a personal decision and I respect it. His private life is his business. But as far as those of us who are MLS fans, unfortunately the league loses a great soccer player.
"Hopefully Robbie changes his mind and comes back to play. There's still time."