[3][2] Samitha Dulan was born and raised up in Deniyaya, Southern Province.

[4] Dulan suffered an impairment in his right leg after a tragic motorbike accident and took up para sports in 2017.

Dulan's fourth-place finish in the men's F44 category of the javelin throw event at the 2019 World Para Athletics Championships in Dubai secured his berth in order to obtain direct slot to compete at the 2020 Summer Paralympics.

[6] Dulan claimed bronze medal in the men's javelin throw F64 category at the 2020 Tokyo Paralympics.

[9][10] In May 2024, he set a new world record in men's F44 classification javelin throw event during the 2024 World Para Athletics Championships after clearing a record distance of 66.49 meters in his first attempt in the final.