The Citroën C3 is a supermini car (B-segment) produced by Citroën since April 2002. It replaced the Citroën Saxo in the model line up, and is currently in its fourth generation. The third generation model made its appearance in June 2016, and went on sale in January 2017.

The B-segment is the second smallest of the European segments for passenger cars, between the A-segment and C-segment, and commonly described as "small cars". The B-segment is the largest segment in Europe by volume, accounting for 20 percent of total car sales in 2020 according to JATO Dynamics.