MX3 or MX-3 may refer to:
Mazda MX-3, a car by Mazda Meizu MX3, a smartphone released in 2013 MX3, a food supplement brand in the Philippines owned by DMI Medical Supply Co., Inc. Pilipinas MX3 Kings, its defunct Philippine basketball team MX3 class in the Motocross World Championship List of Malaysian films of 2003