Cat3

Cat 3 or CAT3 may refer to:


 * Category 3 cable, an unshielded twisted pair cable
 * Nanaimo/Long Lake Water Airport (ICAO airport code), Canada
 * Cognitive Abilities Test 3, a test of reasoning abilities undertaken by students in the UK and Canada
 * CAT III, an instrument landing system category
 * CAT III, a measurement category used to classify live electric circuits
 * LTE User Equipment Category 3