Sri Lanka at the 2012 Summer Olympics 50 metre rifle prone competitions in the qualifying round but did not score enough points to advance. Neither Unamboowe nor Udugampola, competing in the men's 100 metre backstroke and women's 100 metre freestyle, were fast enough to advance beyond their initial heats. Sri Lanka participated in sixteen Olympic Games between its debut at the 1948 Summer Olympics in London, United Kingdom and the 2012 Olympic Games held in the same city. The sole exception was the 1976 Summer Olympics in Montreal. Though it was widely believed the country was participating in a boycott relating to the tour of South Africa
Bids for the 2012 Summer Olympics bid is announced. Following the announcement of the host city, the successful bid delegation signs the "Host City Contract" with the IOC, which delegates the responsibilities of the Games organisation to the city and respective NOC. The deadline to submit applications for the 2012 Summer Olympic Games was 15 July 2003. The nine cities that submitted bids before that date also met the 15 January 2004 deadline for submission of the first phase questionnaire. Through analysis of the questionnaires, the IOC gave a weighted-average score to each city based on the scores obtained in each of the questionnaire's eleven themes: