Too late to start now?

why not try, since you’ve already signed up? ‘is it too late’ doesn’t really have an answer, it just gets less and less likely that you’ll pass the later it gets.

lol 

Unless you possess superhuman study discipline, you may be too late. To succeed on the Level III test, you will need to study at least as much as you did for the Level II.  The books are thinner, but the required level of understanding seems to be much deeper.