The 35 km (22 mi) long broad-gauge line was approved in 2019.

It is named after the flower Parijaata (Nyctanthes arbor-tristis) in Kannada.

The route between Kengeri and Whitefield, proposed by RITES in 2018 was approved on 7 October 2020 by government of India along with three other corridors of Bengaluru suburban rail project.

Since almost entirety of the Parijaata route ran along exisitng Purple line of Namma Metro.

[4] In December 2024, Rajkumar Dugar, founder and convenor of Citizens for Citizens (C4C), proposed splitting of the construction of line in two segments C3A and C3B, with C3A running from Kengeri to Bangalore Cantonment railway station and C3B from Cantonment to Whitefield, while prioritising C3A as it was said to become the fourth railway terminal of the city.