H3, H03 or H-3 may refer to:
== Entertainment == H3 (film), a 2001 film about the 1981 Irish hunger strike H3 – Halloween Horror Hostel, a 2008 German horror-parody television film Happy Hustle High, a manga series by Rie Takada, originally titled "H3 School!" h3h3Productions, styled "[h3]", a satirical YouTube channel
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).