Marcelo's contract with Fluminense was terminated following a series of disagreements and disrespectful attitudes towards the staff and coach Mano Menezes. The relationship had been worsening since early 2024, with reports indicating that Marcelo had been seeking privileges and had criticized the coach and staff. A final incident prompted the club to decide to end his contract before the season concluded. Marcelo had already acknowledged that he was contemplating ending his career by the year's end.

Marcelo and Fluminense have mutually agreed to terminate his contract. He had rejoined Fluminense in 2023 following a successful period at Real Madrid and a short tenure at Olympiakos. The decision to part ways was influenced by an incident where Marcelo disagreed with his coach, Mano Menezes, during a match against Gremio. Although the contract was ended, Fluminense conveyed their appreciation for Marcelo's contributions, which included victories in the Campeonato Carioca 2023, the Conmebol Libertadores 2023, and the Recopa 2024.

Marcelo and Fluminense are negotiating an immediate contract termination following a public disagreement with the coach, Mano Menezes. Although Marcelo's contract is set to end in December this year, the situation might be expedited. Marcelo had recently expressed a desire to renew his contract until 2025.