Disadvantage of Having No Counselor Recommendation?

My school begins Christmas break next monday the 25th, meaning that Friday the 22nd is the last day of classes. I am afraid that my counselor may not have time to write a rec letter. If she doesn’t write one due to time constraints and indicates that on the Common App School Report form will I be at a disadvantage in my admissions? I have two solid teacher recs and the rest of the School Report should be good, so how much will this affect me? Thanks for the help!

If the college requires a counselor rec, then it requires a counselor rec. An application without one will be considered incomplete.

Having said that, it is unlikely that this is the first rodeo for the GC and it will get done. Most, but not all, universities will give a few days leeway for elements out of your control. So if the rec arrives 1/3, not a big deal.