Since the publication of the Cold Start Doctrine by India in 2004, India had been preparing for launching a limited war against Pakistan. In the face of an Indian threat of limited war, Pakistan had no other option but to go for the manufacture of low yield nuclear weapons. With the introduction of the low yield nuclear weapons by Pakistan with an official announcement in 2015, Pakistan had been able to contain Indians from pursuing the path of limited war against it. This paper has looked into the role Pakistan's low yield nuclear weapons in dealing with the threat of limited conventional war under the Indian Cold Start Doctrine. Firstly, it has explored three Indo-Pak crises with limited war dimensions, which occurred subsequently in 2008, 2016 and 2019 and brought a fear of limited war on Pakistan's side. Secondly, it has explained the changing military doctrines of India and Pakistan and further highlighted the gap which led to the emergence of India's Cold Start Doctrine and Pakistan's low yield nuclear weapons. Third, it has looked at the role of Pakistan's low yield nuclear weapons in creating a roadblock in the Indian Cold Start Doctrine. Finally, it has given a discussion and summary.