3E

3E or 3-E may refer to:


 * 3e, general entertainment channel in Ireland
 * 3rd meridian east
 * Third edition in the Editions of Dungeons & Dragons
 * NY 3E, alternate name for New York State Route 104
 * OK-3E, abbreviation for Oklahoma State Highway 3
 * 3E, a model of Toyota E engine
 * 3$e$, an abbreviation for 3ème, the third ordinal number in the French language
 * 3Ε (Tria Epsilon), an abbreviation for the Coca-Cola Hellenic Bottling Company