Series 3
- 3 Skypephone Series
- 300 series (disambiguation)
- Apple Watch Series 3
- Aston Martin Lagonda
- Aston Martin V8
- BMW 3 Series
- GP3 Series
- GeForce 3 series
- Land Rover series
- Model 3 (disambiguation)
- Psion Series 3
- Samsung Series 3 Chromebox
- Scania 3-series
- South African Class 6E1, Series 3
- Super3 Series
- System 3 (disambiguation)