As in previous seasons, the draw for the third round of the cup was carried out in two sections, the first pairing together the lower ranked sides and the second with only the second division A sides. Three regional third division sides, Lorca FC, Multivera and Sant Andreu, are still in the competition. Matches will be played on or around 17th October, with the winners joining first division clubs in the fourth round. (14.09.18)
|| Lleida Esportiu
|| UD Logroñés
|| Cultural Leonesa
|| Sporting Gijón
Mallorca have been given a bye to the fourth round.