HH3

HH3, HH-3, HH 3, HH.3, may refer to:


 * Sikorsky HH-3, a variant of the Sikorsky SH-3 Sea King helicopter
 * HH3, a model in the series of Honda Acty trucks
 * Prokineticin receptor 2 (HH3)
 * Late late Hemphillian (Hh3), a substage of geologic history in North America; see 2017 in paleomammalogy


 * The Short Victorious War (novel), abbreviated "HH3", third main-line novel in the Honor Harrington novel series, part of the Honorverse fictional milieu created by David Weber