What happens to Tiny Tim during Scrooge's time with the ghost of Christmas yet to come?

In Stave Four, we learn that Tiny Tim has died.

"It's just as likely as not," said Bob, "one of these days; though there's plenty of time for that, my dear. But however and when ever we part from one another, I am sure we shall none of us forget poor Tiny Tim -- shall we -- or this first parting that there was among us."