Soldier Boy did not die at the end of season 3 of The Boys. In the final episode, he went nuclear again during a fight, and Maeve tackled him out of a window to divert the explosion. She survived but lost her powers, while Soldier Boy was put back into a cryogenic slumber under the watchful eye of Grace Mallory. The showrunner, Eric Kripke, has confirmed that the door is open for Soldier Boy to make a return appearance in a future season. While it is unclear what will happen to Soldier Boy in the future, it is known that he did not die at the end of season 3 and was instead put back into cryogenic sleep.