Nicola Belmonte began his career in the youth of the AS Bari. For the 2004/ 05 season, he was awarded for AS Melfi in the C2 series, where he played his first few games as a professional. After he returned in the following season to Bari, he was accepted into the professional squad of AS Bari. In his first season with the Apuliern he could not impose a regular place and received only a few applications. In the following two years, he completed about half of the Serie B appearances for Bari and placed with the team mostly in the mid-table of the second highest Italian league. In the summer of 2008, he bought the first division side AC Siena. The Tuscans he made his debut in the match against Reggina Calcio on 31 May 2009 in Serie A. This was also his only use for Siena. On 26 June 2009, the AS Bari announced the return of defender. He was initially taken to the end of the season as Players out on loan under contract.
Belmonte played in the Italian U -17, U -18, U -19 and U-20 national teams. Overall, he played 16 international matches for all youth national teams of Italy.