There are three missions titled "Citadel: Leviathan" included in Mass Effect 3: Leviathan.
- For the mission after Citadel: Dr. Bryson, see Citadel: Leviathan I
- For the mission after Mahavid: Leviathan, see Citadel: Leviathan II
- For the mission after Namakli: Leviathan, see Citadel: Leviathan III