 | This article relies largely or entirely on a single source. (February 2017) |
The 2005 Formula 3 Sudamericana season was the 19th Formula 3 Sudamericana season. It began on 12 March 2005, at Autódromo Internacional de Curitiba and ended on 11 December at Autódromo José Carlos Pace in São Paulo. Brazilian driver Alberto Valério won the title.