Races in calendar week 12/2003
All motorsport events on the weekend of 21–23 Mar 2003.
| Circuit | Country | Series |
|---|---|---|
| Adelaide |  Australia |
|
| Curitiba |  Brazil |
|
| Fontana |  USA |
|
| Monterrey (Fundidora Park) |  Mexico |
|
| Phoenix (oval) | USA |
|
| Sepang |  Malaysia |
|
| Suzuka |  Japan |
|