The zone's competition was held in round robin format in two different locations, Plovdiv, Bulgaria and Ulcinj, Montenegro, from 3 to 7 April 2018.
The two winning nations won promotion to Group II, Europe/Africa Zone, for 2019.
Date: 3–7 April Location 1: Tennis Club Lokomotiv, Plovdiv, Bulgaria (clay) Location 2: Ulcinj Bellevue, Ulcinj, Montenegro (clay) Format: Round-robin basis.
The winners of each pool play-off against each other to determine which nation will be promoted to Europe/Africa Zone Group II in 2019.
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.