Diyasaru Park is an urban wetland and protected area located in Thalawathugoda, near the Parliament Complex in Sri Jayawardenepura Kotte.

Spanning 60 acres, the park is home to a variety of bird and plant species, marshlands, ponds, and elusive fishing cats.

Opened to the public in 2017, the park serves as a space for recreation, education, conservation, and flood detention.