The 3rd Five-Year Plan (1961-1966) aimed to enhance India's economic development by prioritizing agriculture and basic industries while responding to the challenges posed by population growth and the aftermath of partition. Despite some successes, including improvements in education and infrastructure, the plan faced significant failures due to financial difficulties, adverse weather, and geopolitical tensions, leading to lower than expected growth rates. Ultimately, the plan highlighted the need for a balanced approach to regional development and set the stage for subsequent planning efforts.