SM3

SM3, Sm3, sM3, sm3 or SM-3 may refer to:

Spider-Man 3, the third Spider-Man film released in 2007
Superman III, the third Superman film released in 1983
Renault Samsung SM3, a car model made by Renault Samsung
VR Class Sm3, a type of train operated by the VR Group
SM3 postcode area, the Sutton postcode area covering North Cheam
RIM-161 Standard Missile 3, a naval launched anti-ballistic missile used by the US Navy
SM3 (hash function), a standardised cryptographic hash function for commercial use in China
Standard cubic meter (Sm³), an industrial unit measuring the amount of a gas
Shawn Mendes (album) or SM3, the third album by the Canadian singer Shawn Mendes