If I had a dollar for every meaningless platitude said to me at my sons funeral. The thing I remember was what a friend of mine said. She was very quiet and it was not like her but at the end she came up to me and said, "Ben (my son) was not the promise fulfilled, he was the promise spoken (he was a preemie, only lived a few hours). She really thought before she said that and it meant so much it's on his marker.
She wasn't trying to be poetic but was. She just said the right thing at the right time. She didn't try to tell me it was anyone's will or plan, and in the death of children and suicide that sort of thing is, imo, wrong and out of place. I know you think no one would say that about a suicide. Well you're wrong. My friends daughter commited suicide and told her that if God had wanted her to live someone would have found her sooner. Since my friend found her... You can imagine the heartache that caused.
Say something simple or nothing at all. Those are the people that stand out and comforted me when it was really dark.