The phrase "unfortunate passing" is used to describe someone's death in a way that expresses sympathy or sadness about the circumstances surrounding it. Full definition
Ever since the untimely and unfortunate passing of actress Carrie Fisher last December, fans of the Star Wars saga have wondered how this will affect the sequel trilogy and the role of General Leia for Star Wars: Episode IX (she already completed filming for Star Wars: The Last Jedi before she passed). (popcornmonster.com)
I told her how my beloved Aunty's unfortunate passing on propelled me to decide that I wanted to make my life count. (dishbydish.net)
The Silence of the Lambs is one of the few movies that was recognized almost immediately for its cultural impact, so it's nice to have these extra features, especially since Demme's unfortunate passing last spring. (scene-stealers.com)