Can a cardinal out himself out of the candidates pool during a conclave?

*Note: this question is inspired by the movie Conclave (2024) but is **specifically** not a movie question. I am only interested in the legal/formal aspects.* During a contemporary papal conclave , the next pope is chosen among the cardinals present at the ceremony. Is it possible (formally/legally, not through arrangements) for a cardinal to publicly (in the conclave assembly) declare himself **not** a candidate?