In Genesis 18, Abraham is visited by three "men" who are later revealed to be angels, or "malakim" in the next chapter.
In Genesis 19, there are three women described: Lot's two daughters, and Lot's wife.
Lot's two daughters survive with him, but his wife dies when she is turned into a pillar of salt.
There were three women; two women live, one dies.
There were three angels; two angels are present, one is absent.
Perhaps this is related.