"We do not accept the so-called accession of the State of Jammu and Kashmir to India. Kashmir is not an integral part of India. Our position is that Jammu and Kashmir is a disputed territory," Foreign Office spokesperson Tasnim Aslam Khan said during a briefing.
Her remarks came on the eve of Modi's one-day visit to Jammu and Srinagar.
"People of the State of Jammu and Kashmir have yet to exercise their right to self determination which has been assured to them by almost 20 resolutions of the United Nations Security Council," Khan said in response to a question on Modi's visit to the state.
During the visit, Modi will make his first stop in Jammu from where he will go to Katra to flag off the inaugural train from the newly built Katra Railway station to Udhampur.
The Prime Minister will later fly to Srinagar where he will address a 'Sainik Sammelan'.