He will be focussing more of his time on the charity he founded, Home for Good, which supports foster parents and children and also equips the Church to support both parties.
Mr Kandiah will also pursue other writing, speaking and advocacy work he is involved in.
Grant Masom, Chair of the LST Board, said: "We would like to thank Krish for the incredible energy and advocacy that he has brought to the London School of Theology.
"We wish him well in his important endeavour at Home for Good and pray for the continued impact the work there will achieve in changing lives and finding homes for children."
Krish Kandiah said: "There have been many happy memories generated by my time at LST.
"I have had the honour of working with some incredibly creative and energetic people.
"I have been pleased to see student numbers increasing and to meet so many students with a passion for God from all around the world."
