Group 3

Group 3 may refer to:


 * Group 3 element, chemical element classification
 * Group 3 (motorsport), FIA classification of cars used in auto racing and rallying
 * Group 3, the third tier of races in worldwide Thoroughbred horse racing
 * Group 3 image format, Group 3 & Group 4 are digital technical standard for compressing and sending faxes
 * Group 3 Rugby League, a rugby competition in Australia
 * Group 3 Films, a British film production organisation funded by the National Film Finance Corporation