The Ivorian, who is in his fourth season with the club, has been one of the star performers in League One this season. However, his current deal is due to expire at the end of the season.
Moore told the club's official website: "I'll be very surprised if he is here next year. We've spoken to him and he's saying all the right things but it's not getting through to the agent because he still hasn't rung me.
"I think the game on Saturday will be Zoum's last game for us."
A host of clubs are understood to be monitoring developments.