| Competition: | Nemzeti Bajnokság III |
| Season: | 2012–13 |
| Winners: | Soroksár (Alföld) Dorog (Bakony) Dunaújváros (Dráva) Budaörs (Duna) Felsőtárkány (Mátra) Kisvárda (Tisza) |
| Promoted: | Dunaújváros Kisvárda |
| Relegated: | 51 teams |
| Prevseason: | 2011–12 |
| Nextseason: | 2013–14 |
The 2012–13 Nemzeti Bajnokság III was Hungary's third-level football competition.
The relegation play-offs schedule and pairing were announced on 4 June 2013 between Nemzeti Bajnokság III and Megyei Bajnokság I teams.[1]
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All times Central European Summer Time (UTC+2)
Balatonfüred won 10–0 on aggregate and therefore both clubs remained in their respective leagues.----Diósd won 16–2 on aggregate and therefore both clubs remained in their respective leagues.----Jászapáti won 9–4 on aggregate and therefore both clubs remained in their respective leagues.----MTK II won 19–0 on aggregate and therefore both clubs should have remained in their respective leagues however the reserve team decided to not compete in any division next season.----Maglód won 10–2 on aggregate and therefore both clubs remained in their respective leagues.----3–3 on aggregate. Majos won on away goals and were about to be promoted to the Nemzeti Bajnokság III, however they decided to not compete in it, while Mosonmagyaróvár were about to be relegated to the Megyei Bajnokság I, however they remained in NB III due to withdrawals.----Dunaharaszti won 7–2 on aggregate and therefore both clubs remained in their respective leagues.----Nagyatád won 7–0 on aggregate and therefore both clubs remained in their respective leagues.----Pécsvárad won 4–2 on aggregate and were about to be promoted to the Nemzeti Bajnokság III, however they decided to not compete in it, while Szentlőrinc are relegated to the Megyei Bajnokság I.[2] ----Veresegyház won 5–4 on aggregate and are promoted to the Nemzeti Bajnokság III, while Rákosmenti KSK were about to be relegated to the Megyei Bajnokság I, however they remained in NB III due to withdrawals.----Tiszaújváros won 13–4 on aggregate and therefore both clubs remained in their respective leagues.----Cigánd won 5–0 on aggregate and therefore both clubs remained in their respective leagues.----Létavértes won 17–0 on aggregate and therefore both clubs remained in their respective leagues.----Tököl won 3–0 on aggregate and therefore both clubs remained in their respective leagues.----Újbuda won 4–1 on aggregate and therefore both clubs remained in their respective leagues.----3–3 on aggregate. Pécs II won on away goals and therefore both clubs should have remained in their respective leagues however the reserve team decided to not compete in any division next season.----Videoton II won 6–3 on aggregate and therefore both clubs remained in their respective leagues.----Ebes won 4–1 on aggregate and are promoted to the Nemzeti Bajnokság III, while Körmend were about to be relegated to the Megyei Bajnokság I, however they remained in NB III due to withdrawals.----Gyula won 9–0 on aggregate and therefore both clubs remained in their respective leagues.----Rákospalota won 7–3 on aggregate and therefore both clubs remained in their respective leagues.