保加利亞丙級聯賽

The Bulgarian Third Amateur Football League (Bulgarian: Трета аматьорска футболна лига, romanized: Treta Amat'orska Futbolna Liga), commonly referred to as Third League (Bulgarian: Трета лига) or Treta liga, is the third level of the Bulgarian football league system. Third League operates on a system of promotion and relegation with the second and the fourth tier of the Bulgarian football league pyramid – respectively being Second League and the A Oblast Groups. Currently Third League consists of four divisions that are formed by separating the country into four regions: North-West, South-West, North-East and South-East. The divisions run in parallel during the season, but since the number of teams in each division may vary, the number of rounds in each of them may vary. Each team must play at least two times against every other team on a home-away basis.

The Third League was created in 1950, along with the second level. It is administered by the Bulgarian Football Union, and the clubs in it have an amateur status. Nowadays, only the top teams of each division have the right to participate in the Bulgarian Cup tournament, but since 1995 the clubs in the group can participate in the Cup of Bulgarian Amateur Football League competition.