Refusal rate by visa class

Worldwide, all nationalities combined, FY2013–FY2024.

These are global figures and cannot be broken down by country. The US publishes refusal rates by nationality only for B visitor visas, and by visa class only worldwide. There is no official F-1 or H-1B refusal rate for any single country. The full explanation.
ClassFY2024 refusal RefusedApplicationsSince FY2013 Trend
B1/B227.76%2,497,1048,995,108+6.9
BBBCC14.19%309,4502,181,216-3.0
F141.01%278,553679,290+17.9
J110.96%39,747362,567-3.7
C1/D3.17%10,606334,704-5.1
H2A3.90%12,800328,128-7.0
H1B2.79%6,298225,957-10.3
H2B4.17%6,072145,613-10.6
H43.41%4,932144,806-7.1
A24.25%4,287100,980-13.7
L22.57%1,93175,248-10.1
L13.90%2,91474,713-15.3
E29.94%6,10861,432-8.9
K111.41%6,13053,709-17.2
BBBCV15.55%7,36447,352+1.5
F248.78%22,91246,967+20.8
B121.20%8,48740,031-4.0
J28.58%3,05035,562-7.7
TN42.63%11,64527,317+30.6
P15.13%1,32525,819-10.2
G42.82%64923,014-7.2
B244.05%9,50521,577-4.3
O15.86%1,21220,669-10.7
G28.67%1,57218,125-7.0
C130.19%4,95216,403+11.6
O25.31%78114,703-5.6
I11.32%1,65014,574-0.2
TD11.40%1,56913,768+3.0
P316.49%2,01612,229-16.0
A14.10%4059,874-15.0
NATO20.67%588,688-2.6
M126.14%2,2378,559+2.1
K21.95%1457,451+0.7
O310.29%6926,727-4.4
D4.16%2756,617-10.9
R119.42%1,2506,436-0.9
E18.17%5026,141-9.2
G17.52%3895,175-16.0

Source

US Department of State, NIV Workload by Visa Category, FY2013–FY2024. Columns are Issued, Refused, Total Applications. Every year in this table was verified by reconciling each column against the source document's own printed grand total.