Answered June 2nd, 2019

Quinn Cook is just the second Warriors player to make at least 3 three-pointers off the bench in an NBA Finals game, joining Andre Iguodala from last season.

who is the last warriors player with 3 3PM in a finals game off the bench
Interpreted as:
Who is the last warriors player with 3 or more 3PM in a finals game off the bench?