During the 2016–20 parliament, Čomić was deputy chair of the parliamentary committee on constitutional and legislative issues; a member of the committee on Kosovo-Metohija, the European integration committee, and the committee on the rights of the child; a deputy member of the environmental protection committee and the defence and internal affairs committee; a deputy member of the European Union–Serbia stabilization and association committee; a member of a commission to "investigate the consequences of the NATO 1999 bombing on the health of the citizens of Serbia, as well as the environment, with a special focus on the impact of the depleted uranium projectiles"; a deputy member of the Serbia's delegation to the South-East European Cooperation Process parliamentary assembly; and a member of the parliamentary friendship groups with Albania, Bosnia and Herzegovina, Croatia, Germany, Israel, the United Kingdom, and the United States of America.