Four teams qualified for the final stage, where they will play-off over one leg for the two remaining promotion spots. Curiously, all four are from regional group III. (23.07.20)
Results were as follows. Castellón and Sabadell are promoted. (26.07.20)
| 26 Jul | Castellón Juanito Ortuño |
1-0 | Cornellà |
| 26 Jul | Barcelona B Monchu |
1-2 | Sabadell Aleix Coch, Néstor |