HH3 or 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) The Short Victorious War, the third novel in the Honor Harrington series by David Weber, abbreviated HH3
See also
H3 (disambiguation)