| Season: | 2012–13 |
| Relegated: | FC Nitra B (West) Tatran Prešov juniori (East) Spišská Nová Ves (East) Lučenec (East) |
| Promoted: | Spartak Trnava juniori (West) FK Pohronie (East) |
| Nextseason: | 2013–14 |
The 2012–13 3. Liga (Slovakia) season of the 3. Liga (also known as the Keno 10 3. liga[1] for sponsorship reasons) was the 20th edition of third tier annual football competition in the Slovakian league system, since its establishment in 1993.
32 teams were divided into two geographic groups each with 16 teams each that contested teams in their own group: 3. liga západ (Group West) and 3. liga východ (Group East).
Changes from last season included:
Changes from last season