Kapilvastu 3 one of three parliamentary constituencies of Kapilvastu District in Nepal.

This constituency came into existence on the Constituency Delimitation Commission (CDC) report submitted on 31 August 2017.

[1] Kapilvastu 3 incorporates Bijayanagar Rural Municipality, Shivaraj Municipality, Krishnanagar Municipality, and wards 5–7 of Maharajgunj Municipality It encompasses the following Lumbini Provincial Assembly segment