I'm applying to grad school, and I have 3 wonderful recommenders. The problem is this: I realized that I didn't notify my third recommender that I would require another recommendation letter (I added on a last application rather last minute). They have already left the country for research over break, and I honestly feel that it would hurt our relationship if I asked them at such late notice (as it quite frankly should). On the other hand, I would look incredibly ill-prepared if I admitted my predicament to my other recommenders.
Is it worse to notify them that I won't be submitting that application now or simply not mention it?
Unlike the other programs I'm applying to, none of my recommenders know anyone at this college, so I doubt they'd find out quickly on their own.