San Marino participated in the Junior Eurovision Song Contest 2015 in Sofia, Bulgaria. On 27 September 2015 it was confirmed that they would participate in the 2015 contest. The country used an internal selection to select the artist and the song. Kamilla Ismailova represented San Marino with the song "Mirror".

The Junior Eurovision Song Contest 2015 was the thirteenth edition of the annual Junior Eurovision Song Contest, and took place, for the first time, in Bulgaria. The Bulgarian national broadcaster BNT was the host broadcaster for the event. The final took place on 21 November 2015 and was held at the Arena Armeec in Sofia. Poli Genova, a Bulgarian singer and former representative of Bulgaria in the Eurovision Song Contest 2011, hosted the show. A total of seventeen countries participated, with Australia and Ireland making their debuts. Albania and Macedonia returned after being absent since the 2012 and 2013 contests, respectively. Croatia and Cyprus withdrew after returning in the 2014 edition, while Sweden withdrew for the first time since 2008.