The Permanent Representative of India at the United Nations TS Tirumurti said that Khan's statement was "a new diplomatic low".
"Today, all those institutions no longer serve us well enough on what they were designed for - defending multilateralism and international law, protecting human rights and open markets", he said.
The annual session of United Nations (UN) General Assembly will begin in New York on September 21 commemorate the 75th anniversary of the United Nations.
The diplomat stated that in view of the COVID-19 travel restrictions, most leaders will not travel to New York and the high-level debate will be conducted virtually.
On the issue India's priorities at the UNSC, he said "Combating terrorism is obviously going to be a very important priority for us. Keeping in mind that we have been victims of decades of cross-border terrorism.
Jadhav, 49, was purportedly "arrested" from Balochistan by Pakistani security forces on March 3, 2016, after he allegedly entered the country from Iran as claimed by Islamabad.
This comes a day after New Delhi had strongly condemned Khan's "provocative" speech at the latest session of the UNGA and stated that it indicated Khan's inability to conduct international relations.
Islamabad has tried raking up the Kashmir issue on several international platforms following India's decision to abrogate Article 370 which accorded special status to Jammu and Kashmir.
The announcements made by the Ministry of Foreign Affairs (MoFA) also included 10 new envoys, including that to Sri Lanka, Bangladesh and Kuwait.
Sarder Patel united 630 provinces. Nehru had just one job (to united J&K with India). But that job got done only in August 2019 (when Modi govt took the decision on Article 370)," Amit Shah said.