X3 may refer to:
==Arts, entertainment, and media== ===Films=== X-Men: The Last Stand, also known as X3 and X-Men 3, the third film in the comic book film series XXX: Return of Xander Cage, a 2017 American film directed by D. J. Caruso
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).