2023–24 Liga 3 (Portugal)

The 2023–24 Liga 3 is the third season of Portuguese football's third-tier league, following the reorganization which saw the Campeonato de Portugal moving one level down in the Portuguese football league system. First season with a total of 20 teams compete in this division, after the reduction in the previous edition.

Format
This competition consists of a first stage with all the teams then proceed to a promotion or relegation series depending on their performance.

Teams
A total of 20 teams contested the league, including 3 teams relegated from the 2022–23 Liga Portugal 2, 13 teams that have been in 2022–23 Liga 3 and 4 teams promoted from the 2022–23 Campeonato de Portugal.

B-SAD sports society's licence was relocated to Cova da Piedade, as a result of a fusion. On 13 July 2023, the Portuguese Football Federation informed that Cova da Piedade failed to obtain a licence to play in Liga 3, being replaced by the best placed team in 2022–23 Campeonato de Portugal that wasn't promoted: Pêro Pinheiro.

Team changes
Relegated from 2022–23 Liga Portugal 2 Promoted from 2022–23 Campeonato de Portugal
 * Cova da Piedade (B-SAD licence)
 * Sp. Covilhã
 * Trofense
 * 1.º Dezembro
 * Atlético CP
 * Lusitânia Lourosa
 * Pêro Pinheiro
 * Vianense

Promoted to 2023–24 Liga Portugal 2 Relegated to 2023–24 Campeonato de Portugal
 * Belenenses
 * Länk Vilaverdense
 * União de Leiria
 * Fontinhas
 * Moncarapachense
 * Montalegre
 * Paredes
 * Real SC
 * São João de Ver
 * Vitória de Setúbal
 * Vitória de Guimarães B

First stage
In the first stage, the 20 clubs will be divided in two series (Série A and B) of 10 teams, according to geographic criteria.

Promotion stage
The eight qualified teams of each series will playing against each other in a home-and-away double round-robin system. The winners and runner-ups of the series will be automatically promoted to Liga Portugal 2. The third placed team will face face the 16th placed of Liga Portugal 2 for the last spot in Liga Portugal 2.

Relegation stage
The bottom 12 teams are divided in two series of 6 teams, playing against each other in a home-and-away double round-robin system. To account for their performance in the first stage, teams will start with bonification points, with 5th placed teams starting with 6 points and 10th placed teams starting with 1. The bottom two teams of each series will be relegated to Campeonato de Portugal.