The Africa Zone was the unique zone within Group 3 of the regional Davis Cup competition in 2021. The zone's competition was held in round robin format in Cairo, Egypt, from 11 to 14 August 2021.
Format: Round-robin basis. Two pools – one of four teams and one of three teams – and nations will play each team once in their group. Nations finishing in the top two of each group will play-off for promotion, with the winner of Group A facing the runner-up of Group B, and the winner of Group B facing the runner-up of Group A.
The two teams finishing third in their groups will enter a relegation play-off, with the beaten team joining the team finishing fourth in contesting Africa Group IV in 2022.
Standings are determined by: 1. number of wins; 2. number of matches; 3. in two-team ties, head-to-head records; 4. in three-team ties, (a) percentage of sets won (head-to-head records if two teams remain tied), then (b) percentage of games won (head-to-head records if two teams remain tied), then (c) Davis Cup rankings.