Chrishell Stause is trying to make the sun go down on the drama surrounding her lack of invite to the "Selling Sunset" premiere ... telling a photog it's really not a big deal to her.

Paps caught up with the reality star Saturday ... and they asked her about being excluded -- along with Chelsea Lazkani -- from an unofficial season 9 premiere party fellow castmate Bre Tiesi threw. Netflix didn't have an official release party for the season. Gallery Launch Gallery Getty

Stause says it's "all good" ... adding she couldn't go anyway because she was in New York City making an appearance on Andy Cohen 's 'Watch What Happens Live.'

As for if Chrishell will be back for season 10 of the hit show ... Stause's response is pretty simple -- what do you think???

Sources told us B

See Full Page