MTCR-an informal and voluntary partnership among 35 countries that regulates trade in sensitive equipment and technologies to ensure there is no proliferation of missile and unmanned aerial vehicle technology capable of carrying payloads above 500kg for more than 300km. India had joined it in June 2016.

India is not a member of the Nuclear Suppliers Group (NSG).

The Nuclear Suppliers Group (NSG) is a multinational body that aims to prevent the proliferation of nuclear weapons by controlling the export of nuclear materials, technology, and equipment. It was formed in 1974 in response to India's first nuclear test, which demonstrated that a non-nuclear-weapon state could develop nuclear weapons using civilian nuclear technology.

The NSG currently has 48 members, including most of the world's nuclear-armed states and major nuclear suppliers. These members have agreed to abide by certain guidelines and criteria for nuclear exports, which include ensuring that the recipient country has full-scope safeguards in place with the International Atomic Energy Agency (IAEA).

India has been seeking membership in the NSG since 2008, arguing that its non-proliferation record and its commitment to disarmament make it eligible for membership. However, its bid has faced opposition from some NSG members, who argue that India has not signed the Nuclear Non-Proliferation Treaty (NPT) and therefore should not be granted membership.

The NPT is an international treaty aimed at preventing the spread of nuclear weapons. It has three main pillars: disarmament, non-proliferation, and the peaceful use of nuclear energy. India is one of four states recognized as nuclear-armed states outside of the NPT framework, along with Israel, Pakistan, and North Korea. These states are not signatories to the treaty and are not subject to its provisions.

India's exclusion from the NSG has been a point of contention for the country, as it believes that its membership would enhance its ability to access nuclear technology for peaceful purposes. It has received support from some NSG members, including the United States, but has been unable to secure the necessary consensus among all NSG members to gain entry into the group.

In conclusion, India is not a member of the Nuclear Suppliers Group (NSG) due to its status as a non-signatory to the Nuclear Non-Proliferation Treaty (NPT). Despite its efforts to gain membership, it has faced opposition from some NSG members, preventing its entry into the group.