Saptari 3 is one of four parliamentary constituencies of Saptari District in Nepal. This constituency came into existence on the Constituency Delimitation Commission (CDC) report submitted on 31 August 2017.In 2026, Amarkant Chaudhary of Rastriya Swatantra Party won the parliamentary election from this constituency.
Saptari 3 incorporates Rupani Rural Municipality, Bishnupur Rural Municipality, Belhi Chapena Rural Municipality, Sambhunath Municipality and Dakneshwari Municipality.
It encompasses the following Provincial Assembly of Madhesh Province segment