This question will resolve as YES if more than one of the following characters die in Guardians of the Galaxy Vol. 3, and resolve as NO if none or only one of them die:

Peter Quill / Star-Lord

Gamora

Drax the Destroyer

Nebula

Mantis

Groot

Rocket

For the purposes of this question, Kraglin Obfonteri, Cosmo, Adam, and other characters will not be counted, regardless of whether they die.

If the film involves variants of characters, such that one variant of one of these characters dies but another does not, I will use my own judgement, but try to resolve this based on what happens to the main timeline version (or, in Gamora's case, the variant introduced in Avengers: Endgame.)

If a character dies, but is brought back to life by the end of the movie, I will not consider this as that character having died. For the purposes of this question, situations such as what happened in the first Guardians of the Galaxy, with Groot dying and leaving behind a living sapling, will also not be counted as that character dying.

If it is unclear whether a character has died, and this affects whether the question would resolve YES or NO, I will use my own judgement as to whether the character is alive, and may resolve N/A if it is sufficiently ambiguous.