Between 2010 and 2017 Stapleton made 50 appearances for Ireland. She made her debut for Ireland against Italy on 5 February 2010. Stapleton represented Ireland at the 2010, 2014 and 2017 Women's Rugby World Cups. At the 2014 tournament she was a member of the Ireland team that defeated New Zealand. She was also a member of the Ireland teams that won the 2013 and 2015 Women's Six Nations Championships. During the 2013 championship Stapleton was a member of the first Ireland team to defeat England. On 26 August 2017 Stapleton made her 50th and final appearance for Ireland against Wales during 2017 Women's Rugby World Cup. Since 2013 Stapleton has also worked for the IRFU as a women and girls development manager.