Former Lok Sabha member from Udhampur and senior Congress leader Chowdhary Lal Singh Sunday resigned from the party.
Singh announced his resignation at a Congress workers' meeting in Kathua town of Jammu.
Singh - who hails from Kathua district - had won the 2003 and 2008 Lok Sabha elections as Congress candidate from Udhampur.
The party this year fielded Ghulam Nabi Azad from the seat. Azad, however, lost the elections to Jitender Singh of the Bharatiya Janata Party.
Before entering the Lok Sabha, Singh was state health minister in the Congress-Peoples Democratic Party alliance government headed by Mufti Muhammad Sayeed.
The denial of a Lok Sabha ticket had angered Singh and he had been publicly voicing his resentment against Azad and other senior leaders of the Congress in recent days.