The actor and writer - who played Ryan Howard in the NBC sitcom before leaving at the start of its current ninth season - explained that he hopes to return before its conclusion in May.
[Left: BJ Novak as Ryan Howard / Right: Mindy Kaling as Kelly Kapoor]
Novak also revealed that his good friend Mindy Kaling (Kelly Kapoor) will join him for the show's series finale.
When asked if they will both return, he told Entertainment Weekly: "That's the plan. We haven't actually worked out any dates or anything, but that's what we say, yeah."
Speaking about Steve Carell's (Michael Scott) decision not to make a return for the finale, Novak said: "You know, I get that. As a fan of the show, I certainly would love to see him one last time.
"But I definitely get it creatively, from his perspective. The show is meant to be a documentary about Dunder Mifflin, and Michael outgrew wanting to be on a documentary. He chose real life over that."
[Left: Steve Carell / Right: Jenna Fischer as Pam Halpert]
The latest episode of The Office gave viewers a glimpse of the camera crew for the very first time, with a cameraman named Brian comforting Pam (Jenna Fischer) after an argument with Jim (John Krasinski).
On the final season's direction, Novak said: "I like a lot of it, but I'm one [episode] behind - and I know it's a very dramatic one.
"[Bringing in the camera crew has] been the plan since the very beginning. I believe that was Mindy's idea, back in season three, to have Pam cry and you reveal that guy [Brian, one of the documentarians], and you reveal that they've had a connection."
When asked what Ryan has been up to since his last appearance, he added: "Well, I have some thoughts, but I don't want to say anything that will contradict what the writers are coming up with. But I think as always, Ryan is lost and thinks he isn't. So now that's probably just happening in Ohio."
BJ Novak will reunite with Mindy Kaling on her Fox show The Mindy Project as a love interest to her main character.
He also worked as an executive producer on the show's pilot episode, and is currently a consulting producer for its first season.