Mir 3

Mir 3 may refer to:


 * Mir EO-3, Mir Principle Expedition 3, to the Mir-1 space station
 * Mir EP-3, Mir Visiting Expedition 3, to the Mir-1 space station
 * Mir-3 microRNA precursor family
 * The Legend of Mir 3, an MMORPG