Probably he's immune? I mean, WCKD says that the immunes are their salvation to make the cure. Other immunes escaped except Minho.
I've corrected that.
He doesn't die, and actually becomes the leader/keeper of the group of immunes :3
I literally had a emotional break-down when he was dragged away, I was yelling at my computer screen: "THERE IS HUNDREDS OF OTHER PEOPLE AND YOU JUST HAD TO CAPTURE MINHO, WHAT IS WRONG WITH YOU PPL?!" XDDD
Maze Runner: The Death Cure is set a whole year after Maze Runner: The Scorch Trials, so that means Minho has been with WCKD for a whole year! Who knows what they may have done to him!? Maybe he escaped.... or maybe he is gonna die... :(