CBBC presenter Mark Speight is to leave his television show SMart following the death of his fiancee, Natasha Collins.
Mark Speight insisted he had nothing to do with Ms Collins' death
"The tragic loss of Tash has affected her family and me very deeply," he said in a statement. "Therefore I feel unable to commit to the next series."
Speight was arrested on suspicion of murder and supplying Class A drugs after Collins was found dead at the couple's London flat on 3 January.
He is no longer a murder suspect, but is on bail over the drugs matter.
The BBC said it accepted Speight's decision.
Joe Godwin, head of Children's Entertainment said: "The next series of SMart is just about to go into production and, given Mark's recent terrible loss, we completely understand his decision.
"Everyone at CBBC wishes him well."