The third season of the fantasy drama television series Game of Thrones premiered in the United States on HBO on March 31, 2013, and concluded on June 9, 2013. It was broadcast on Sunday at 9:00 pm in the United States, consisting of 10 episodes, each running approximately 50–60 minutes. The season is based roughly on the first half of A Storm of Swords. The series is adapted for television by David Benioff and D. B. Weiss. HBO renewed the series for a third season on April 10, 2012, nine days after the second season's premiere. Production began in July 2012. The show was filmed primarily in Ireland, Northern Ireland, Croatia, Iceland and Morocco.

The second season of the fantasy drama television series Game of Thrones premiered in the United States on HBO on April 1, 2012, and concluded on June 3, 2012. It consists of 10 episodes, each running approximately 50–60 minutes. The season mostly covers the events of A Clash of Kings, the second novel of the A Song of Ice and Fire series by George R. R. Martin, adapted for television by David Benioff and D. B. Weiss. HBO ordered the second season on April 19, 2011, which began filming in July 2011, primarily in Ireland, Northern Ireland, Croatia and Iceland.