Dunkin Donuts failed in India because the company did not understand Indian culture and the local market. The company made a number of mistakes, including not understanding the need for coffee in India, not adapting their menu to appeal to Indian tastes, and not investing in marketing.
Dunkin Donuts also failed to create a relationship with its customers, which led to low patronage. In the end, Dunkin Donuts was unable to compete with local coffee chains and failed to make a significant dent in the Indian market.