The teams competed in a home-and-away, round-robin format over the course of the group phase, with matches played in the official FIFA match windows in September, October and November 2019.

[3][4][5] In September 2019, it was announced that the Nations League would also provide qualification for the 2021 CONCACAF Gold Cup.

[6] The winners of each of the four League C groups entered the first round of Gold Cup qualification.

Teams were seeded into the pots of League C according to their position in the November 2018 CONCACAF Ranking Index.

[7][8] The draw for the group phase took place at The Chelsea in Las Vegas, Nevada, United States on 27 March 2019, 22:00 EDT (19:00 local time, PDT).