Well, he'll definitely be on the March 5th episode - "Eye of the Beholder," because it's listed on his IMDB page.
I'm not surprised that he isn't listed for the next episode, seeing how it's going to revolve around the father-daughter dance. Despite Jason now being an issue between Spencer and her dad, his presence at such an event just wouldn't make sense. And not much is up yet for the final two episodes of the season.