PT3

PT3 or variant may refer to:
 * temporary designation of minor planet
 * Consolidated PT-3, a 1930s USAAC primary trainer aircraft
 * PT-3, a World War II US Navy PT-boat.
 * Prison Tycoon 3: Lockdown (2007 videogame)
 * PT3, a paratriathlon classification
 * PT3 Pentaksiran Tingkatan Tiga (or Form Three Assessment) exam, successor of Malaysisan Penilaian Menengah Rendah