India and Iran's strategic relationship has weakened, and Iran, a NPT signatory, is aggrieved by the double standards that are apply to it and to India under the recent US–India nuclear deal.
The Nuclear Suppliers Group waiver
The NSG has granted India a waiver; however, members believed an unconditional waiver would undermine the non-proliferation regime and criticized the US position.
India and the nuclear deal
The Indo–US agreement has been criticized for creating a hole in the Non-Proliferation Treaty and complicating punishment against potential NPT violators, but its supporters claim it brings India into the broader non-proliferation regime.