India is not a member of which of the following international agreement/protocol/treaty:

India acceded to the Protocol Relating to the Madrid Agreement, which entered into force for India on 8 July 2013, but has never joined the original Madrid Agreement Concerning the International Registration of Marks. The two are separate treaties, and the Madrid system today runs under the Protocol.

India acceded to the Nice and Vienna Agreements (and the Locarno Agreement) with effect from 7 September 2019.