The first single from Polaris' then-upcoming album was "Inhumane", released on 26 May 2023. The band was performing the European leg of their ten-year anniversary tour until 20 June when Polaris announced the cancellation of the tour due to a personal crisis, which was announced on 27 June to be Ryan Siew's death at the age of 26 on 19 June. No cause of death was revealed. The following month, on 24 July, the band announced that they would be going forward with the release of
Fatalism and its accompanying tour in honour of Siew, after lengthy discussions between the band and Siew's family. "This is the last set of complete songs that we wrote together with Ryan," the band said in a statement, "and though the circumstances of their release are now framed by this tragedy, the meaning of the songs and the love we have for them has not changed." The album's second single, "Nightmare", was released later that week on 26 July. On 24 August, the band released the album's third single, and last before the album's release, "Overflow". On 27 January 2024, "Nightmare", the album's second single, placed at 90th in the
Triple J Hottest 100, 2023. On 10 May 2024, the band announced the album's fourth single, "Dissipate", which was accompanied by a live music video filmed at
Margaret Court Arena on 9 September 2023, during the Australian leg of the Fatalism tour. ==Tour==