[8] In 1987,[1] after shepherding the bishopric for nearly six years, Devasahayam announced his resignation from the ecclesiastical office of the Bishop citing health reasons and vacated the Cathedra resulting in sede vacante.
Devasahayam studied at the seminary for four years from 1952-1956[3] during the Principalships[3] of Max Hunter Harrison and Joshua Russell Chandran leading to award of Bachelor of Divinity during the annual convocation of the University held in 1957 during the Registrarship of William Stewart.
After a decade and half of ecclesiastical ministry, the Diocese of Medak led by H. D. L. Abraham sent Devasahayam to the McCormick Theological Seminary,[4] Chicago[4] in 1971[4] to upgrade his academics where he enrolled for a Master of Arts[3][5] programme leading to the award of the M.A.
In 1982[1] when the first CSI-Bishop - in - Karimnagar, B. Prabhudass vacated the Cathedra on attaining superannuation, the Church of South India Synod announced the conduction of fresh elections to fill in the sede vacante, following which Devasahayam from the adjoining Diocese of Medak was declared elected and appointed to the bishopric leading to his consecration in 1982 by I. Jesudasan then Moderator of the Church of South India Synod who principally consecrated Devasahayam as CSI-Bishop - in - Karimnagar in the presence of Sundar Clarke, the Deputy Moderator and co-consecrator.
The Church of South India Synod filled the sede vacante by announcing the appointment of K. E. Swamidass, who incidentally was a companion of Devasahayam during his seminary studies in Bangalore.