^2 – Maximilian Günther was disqualified as his car did not stop to be weighed during the session but allowed to start the Feature Race from pit lane.[3]
^4 – Maximilian Günther set the fastest lap in the race but because he finished outside the top 10, the two bonus points for fastest lap went to Artem Markelov as he set the fastest lap inside the top 10 finishers.
^5 – Antonio Fuoco was added 0.8 seconds and Lando Norris was added 1.1 seconds for VSC infractions.[5]
^6 – Roberto Merhi was handed a five-second time penalty for overtaking Arjun Maini under the Safety Car.[5]
^7 – Santino Ferrucci was handed a ten-second time penalty for having carried out clutch bite point checks in the pitlane, failing to comply with instructions from the race director.[5]
^8 – Alexander Albon was handed a five-place penalty for colliding with Nyck de Vries at pit entry in the Feature Race.[6]
^9 — Santino Ferrucci and Nirei Fukuzumi were classified despite retiring as they have completed more than 90% of the race.
^Di Zinno, Tony (6 November 2017). "F2, GP3 2018 schedules released". motorsports.nbcsports.com. NBC Sports. Archived from the original on 27 September 2020. Retrieved 2 April 2018.
^ a b c d"2018 FIA Formula 2 Monaco results". FIA Formula 2 Championship. FIA Formula 2. 24 May 2018. Retrieved 27 May 2018.
^ a b"2018 Round 4 Post-Qualifying Penalties". FIA Formula 2 Championship. FIA Formula 2. 24 May 2018. Retrieved 27 May 2018.
^"Sette Camara to miss Monaco F2 feature race". 25 May 2018. Retrieved 27 May 2018.
^ a b c"2018 Round 4 Sprint Race Penalties". FIA Formula 2 Championship. FIA Formula 2. 26 May 2018. Archived from the original on 27 May 2018. Retrieved 27 May 2018.
^"Albon handed five-place penalty for de Vries clash". 25 May 2018. Retrieved 27 May 2018.