Yes, the character was originally played by David Rappaport:
Rappaport struggled with depression later in his life. Just before his death, he had been cast and began filming for the role of Kivas Fajo in the Star Trek: The Next Generation episode “The Most Toys”. During filming, Rappaport attempted suicide, and the scenes he had completed were later discarded when actor Saul Rubinekwas hurriedly brought in by producers to replace him and complete the episode. The scenes of Rappaport as Kivas Fajo were included on the Season 3 Blu-ray Discrelease of Star Trek: The Next Generation .[3]