ISRO has successfully launched Mark-3 carrying the 3,136 kg GSAT-19 communication satellite !
GSLV-Mk III is capable launching 4 ton class of satellites to Geosynchronous Transfer orbit (GTO). It is a three-stage vehicle with two solid motor strap-ons (S200), a liquid propellant core stage (L110) and a cryogenic stage (C25).
GSLV-Mk III-D1 is the first developmental flight, carrying 3136 kg GSAT-19 satellite to a Geosynchronous Transfer Orbit (GTO).
It was developed over 15 years at a cost of Rs. 300 crore. It is as high as a 13-storey building and can launch satellites as heavy as 4 tonnes (4,000 kg).