Arda Mustafaoğlu participates in: EPTA festivals in Macedonia, international festivals "PERA" in Istanbul (Turkey) in 2011, 2012 and 2013, has more recitals and concerts in Kumanovo, Veles, Skopje (Macedonia). From April 2014 to May 2015 he was awarded the first prizes in almost all Balkan states, as follows:
• In April 2014 he has won first place in the world internet piano competition,
• In May 2014 he won first place at the international piano competition "Little Pianist" in Serbia,
• In June 2014 he won the first prize at the international piano competition "Young Pianists" in Gevgelija (Macedonia)
• In June 2014 he won first place and was named “The winner” of The International Piano Competition "Dojrana" in Dojran (Macedonia),
• In March 2015 in Pernik (Bulgaria) by eight member national jury composed of: Raicho Dinchev Christov, Emilia Caneva, Julia Angelova, Anna Ivanova Todorova, Maria Dobreva Palieva, Rosen Idealov, prof. Dr. Panayot Petrov, and Trufon Velikov Trifunov, Arda was awarded with a special prize - tablet and declared as a laureate of the contest.
• In May 2015 in Vranje (Serbia) by four member international jury composed of: prof. Dr. iliya Chernajev from Bulgaria, Masako Sakai from Japan, Zoran Imshirovic from Bosnia and Herzegovina and Jelena Ristic from Serbia, declared Arda as a Laureate and awarded the first prize - free participation at the summer academy in Vranje and recital in August 2015.
• In May 2015 in Tirana (Albania) four member international jury composed of: Flavio Zakaria from Italy, Heribert Koch from Germany, Lejla Pula from Kosovo and Teresa Trevisan from Italy, gaves Arda a cash prize of 9,000 Lek as The absolute winner of the contest.