BH3

BH3 could refer to


 * The molecule borane, which has a chemical formula of BH3.
 * The Bcl-2 homology domain 3.
 * BH3, the Chinese abbreviation for Honkai Impact 3rd
 * BH3 abbreviation for third edition of Biblia Hebraica (Kittel)


 * Gaia BH3, a binary system consisting of a K2 star and a probable black hole.