IM3

IM3 may refer to:

• Bristol Pegasus I.M3, a British aero engine
• Innocenti IM3, a BMC car model
• Onchan, Isle of Man (Royal Mail postcode IM3)
• Im3 (space group), a symmetry group; see List of space groups
• Indosat Multimedia Mobile (IM3), a telecommunications subsidiary
• Infamous Mobb (aka "IM3"), an American hip hop group
• Intermediate 3 (IM3), a competition class under British Rowing
• Intuitive Machines IM-3, a U.S. commercial lunar lander space mission