The actress appeared in five episodes of the latest season as Nancy Donovan, a love interest for Jack (Alec Baldwin).
However, Moore has now told Entertainment Weekly that she is not sure she will be able to return for the next season.
"It seems like she has bowed out of the Jack race because of [Avery's] pregnancy," she said. "But I hope in some way she gets to come back. If they asked me, I'd be there in a second."
Guest star Matt Damon is reportedly also hoping to return to the show in the future.