He is known for his roles as Bob in Yorgos Lanthimos's 2017 drama The Killing of a Sacred Deer[3] and as the voice and motion capture actor for Atreus, the son of Kratos, in the 2018 video game God of War, for which he was nominated for the BAFTA Award for Best Performance in a Video Game[4] and the D.I.C.E.

[5] He reprised the role in the game's 2022 sequel, God of War Ragnarök, for which he was nominated for Best Performance at The Game Awards 2022, the BAFTA Award for Performer in a Leading Role, and the D.I.C.E.

[6] In 2018, Suljic had his first lead role in Jonah Hill's film Mid90s,[7] for which he received a Critics' Choice Movie Award for Best Young Performer nomination.

In 2018, he played "Stevie" in the drama film Mid90s, directed by Jonah Hill,[7] and had a supporting role as Tarby Corrigan in the fantasy-horror family film The House with a Clock in Its Walls.

He also voiced and did the cinematic motion capture for the character Atreus, the son of Kratos, in the 2018 video game God of War,[9] and reprised the role in its 2022 sequel, God of War Ragnarök.