The 21-year-old, who was linked with a move to West Bromwich Albion in the summer, has found first-team chances hard to come by at the Stade Velodrome.
However, elder brother Andre, who has become a regular for Les Phoceens, has urged Jordan not to quit L'OM.
"Jordan will certainly get to play a lot more but he must play well and that is the truth," Andre Ayew told Citi FM. "We have started the season well and winning teams cannot be changed so he must wait for his time and when that moment comes, he must grab it.
"He was supposed to move because he was not featuring a lot but the coach [Elie Baup] and some people at the club kicked against it.
"He eventually decided to stay and the issue has since been settled and we are looking forward to seeing him play."
Marseille travel to Toulouse on Saturday.