V3 or V03 may refer to:
Medicine
- Mandibular nerve (V<sub>3</sub>), division of the trigeminal nerve
- ATC code V03, a subgroup of the Anatomical Therapeutic Chemical Classification System
- Area V3 of the visual cortex
- V<sub>3</sub>, one of six precordial leads in electrocardiography
Technology
- V3 Gaming PC, an American manufacturer of custom-built personal computers
- V3 engine, a combustion engine configuration
- Flap retraction speed (V<sub>3</sub>) in aviation, see V speeds
- Motorola RAZR V3, a series of mobile phones
- V3 Supercharger, third generation 250 kW battery charger for Tesla electric cars
- Z3 (computer), where it is previously known as V3
- Brilliance V3, a Chinese SUV
- V-3 cannon, German WWII super-cannon
Other
- V-3 cannon, a large-calibre German World War II gun
- LNER Class V3, a class of British steam locomotives
- Belize's International Telecommunication Union callsign prefix
- Carpatair's IATA code
- Past participle form (V<sub>3</sub>) of an English verb
- V3, or v3.co.uk, a British technology news website published by Incisive Media
- V3 (music group), an urban contemporary gospel group from the United States
- Danganronpa V3: Killing Harmony, a 2017 adventure visual novel video game
- Kamen Rider V3, a Japanese tokusatsu television series that aired from 1973 to 1974
See also
- 3V (disambiguation)