My money is on a quick scene to confirm his fate and whereabouts before Thrones jumps back into the main action.
Jaime arguably could be motivated to want to liberate him after coercing him to surrender Riverrun, but I doubt that Tobias Menzies could be on board in a significant capacity without news leaking way before this.
Alternately, Edmure could simply have a small scene to establish where he is and what he’s been up to.