The phrase "notable absence" means that someone or something important is not present or missing, and this absence is particularly noticeable or worth mentioning. Full definition
And they're doing so at least in part, I'd venture, thanks to the most notable absence in the movie: kids. (theatlantic.com)
The i's lack of gearchanges and notable absence of driveline noise make it feel refined. (automobilemag.com)
While there are a few notable absences from the list of participants (like Tarantino, Uma Thurman, Bruce Willis and Ving Rhames), it's still loaded with tons of interesting facts about making the film. (blog.bullz-eye.com)