No, unfortunately not.
In some instances the game will auto-pause when that happens.
A player may also reconnect if he has lost connection, but that doesn't always work.
(As I'm thinking about it now, the game may even allow that a player may join at a later stage. Not sure, but would be cool)
We had a successful reconnect after a crash once, but we also failed many times. What does work is saving and resuming. Iirc, the host pauses and quits. Then he resumes from the main menu and the others join.