Like its predecessor, the Canon EOS M2, the camera uses the Canon EF-Mlens mount. However, the EOS M3 adds a number of new features, including a contoured grip, tilting LCD touchscreen, built-in pop-up flash and dedicated mode dial. Internally, the EOS M3 sports a DIGIC 6image processor, 24.2 megapixel APS-C sensor, Hybrid CMOS AF III 49-point autofocus system, image stabilisation, and integrated Wi-Fi and NFC enabling control of the camera via a smartphone app.
The EOS M3 became available in Europe and Asia in April 2015. The original EOS M3 announcement indicated that the camera would only be available in Europe and Asia.
On August 27, 2015, Canon announced plans to make the camera available in the United States as of October 2015. At its U.S. launch in October 2015, the EOS M3 was available at $679.99 for the body only, or $799.99 for a kit including the EF-M 18-55mm f/3.5-5.6 IS STM lens.