Do US Graduate Admission Committee review and assess International Applicants country-wise?
I doubt that there is any widespread effect of this. In fact, most grad schools would want, and many would require, a &quot;level playing field&quot; for admissions. But the GRE is not the main determinant of anyone's admission. It is at most an indicator, among many others, that might indicate success in a program, or not. Letters of Recommendation are relatively important in US.
Your application needs to give strong indicators of your likely success. But you don't need to be &quot;perfect in every way&quot; to gain admission.