Story:
A relative of mine (Let’s call him Yechezkel) suggested a shidduch and acted as the go-between. The night before the couple was going to get engaged, there was a knock on Yechezkel’s door. It was the boy’s Rosh Yeshiva. He said that the boy had had a mental breakdown of sorts a couple of years ago and had been hospitalized for a few days. He said he knew that the boy’s side had not told the girl’s side about it and that it HAD to be told. He told Yechezkel to make sure the girl’s side found out about it – but to make sure that the information wasn’t traced back to the Rosh Yeshiva.
Yechezkel told the girl’s side about it, which resulted in them making calls to the boy’s parents and then doctors to make an informed decision. The whole time the boy’s side was poo-pooing it and saying that it was no big deal and not wanting to give information.
In the end, the girl’s side broke off the shidduch – NOT because of the mental health issue, but because the boy’s side had not been forthcoming about the issue and the girl’s side felt that the boy’s side could not be trusted.