On December 29, 1984, the Holy See announced the bifurcation of the Diocese of Ajmer - Jaipur and the formation of the Diocese of Udaipur. The new diocese of Udaipur would comprise of the six districts of Udaipur, Rajasamand, Bhilwara, Chittorgarh, Dungarpur, and Banswara in South Rajasthan and the adjoining Tehsil of Thandla (Jhabua district) in Madhya Pradesh. The same was the Bhil - Tribal area evangelized by the Diocese of Ajmer almost from the beginning of the twentieth century.

The First Bishop was also appointed by a Bull from the Holy See, dated December 3, 1984 and promulgated on December 29, 1984. Bp Joseph Pathalil was ordained and took possession of the See on February 14, 1985.