The CONCACAF Council, at its meeting on 25 July 2017 in San Francisco, California approved the implementation of the following two-tier competitions for affiliated clubs of Caribbean Member Associations starting in 2018:
The Tier 1 competition, known as the CONCACAF Caribbean Club Championship, is contested by the champions and runners-up of the top professional and semi-professional leagues in year 1 (2018), and open to only fully professional leagues in year 2 (2019) and onwards.
The Tier 2 competition, known as the CONCACAF Caribbean Club Shield, is contested by the champions of the top leagues in Member Associations that have no professional or semi-professional leagues in year 1 (2018), and open to amateur and semi-professional leagues in year 2 (2019) and onwards.
The winners of the CONCACAF Caribbean Club Championship would qualify to the 2019 CONCACAF Champions League, the second and third place teams would qualify to the 2018 CONCACAF League, while the fourth place team would play against the winners of the CONCACAF Caribbean Club Shield in a playoff match to determine the final Caribbean spot to the 2018 CONCACAF League.
The draw for the group stage was held on 21 December 2017, 11:00 EST (UTC−5), at the CONCACAF Headquarters in Miami, United States, and was streamed on YouTube. The eight teams were drawn into two groups of four. The two group stage hosts were placed in Pot 1, while the remaining six teams were placed in Pot 2. Teams from the same association could not be drawn into the same group.
A total of 12 teams entered the 2018 CONCACAF Caribbean Club Shield. The Dominican Republic was announced as the host nation on 15 February 2018. Host venues, all located at Santiago de los Caballeros, were (all times UTC−4):
The draw for the group stage was held on 15 February 2018, 11:00 EST (UTC−5), at the CONCACAF Headquarters in Miami, United States, and was streamed on YouTube. The 12 teams were drawn into three groups of four without any seeding.
The winners of each group and the best runners-up advanced to the semi-finals.
The CONCACAF Caribbean Club Championship fourth-placed team and the CONCACAF Caribbean Club Shield winners, as long as they comply with the minimum CONCACAF Club Licensing requirements for the CONCACAF League, entered the playoff, with the winners qualifying for the 2018 CONCACAF League.