Hard to say without a reprex. See the FAQ. Assuming that countries are rows, it could be done like
mtcars |> head()
#> mpg cyl disp hp drat wt qsec vs am gear carb
#> Mazda RX4 21.0 6 160 110 3.90 2.620 16.46 0 1 4 4
#> Mazda RX4 Wag 21.0 6 160 110 3.90 2.875 17.02 0 1 4 4
#> Datsun 710 22.8 4 108 93 3.85 2.320 18.61 1 1 4 1
#> Hornet 4 Drive 21.4 6 258 110 3.08 3.215 19.44 1 0 3 1
#> Hornet Sportabout 18.7 8 360 175 3.15 3.440 17.02 0 0 3 2
#> Valiant 18.1 6 225 105 2.76 3.460 20.22 1 0 3 1
# introduce an NA
mtcars[2,] # row named Mazda RX4 Wag
#> mpg cyl disp hp drat wt qsec vs am gear carb
#> Mazda RX4 Wag 21 6 160 110 3.9 2.875 17.02 0 1 4 4
mtcars[2,3] <- NA
# remove all rows with one or more NA
# in the example, there is only one
mtcars[complete.cases(mtcars),] |> head()
#> mpg cyl disp hp drat wt qsec vs am gear carb
#> Mazda RX4 21.0 6 160 110 3.90 2.620 16.46 0 1 4 4
#> Datsun 710 22.8 4 108 93 3.85 2.320 18.61 1 1 4 1
#> Hornet 4 Drive 21.4 6 258 110 3.08 3.215 19.44 1 0 3 1
#> Hornet Sportabout 18.7 8 360 175 3.15 3.440 17.02 0 0 3 2
#> Valiant 18.1 6 225 105 2.76 3.460 20.22 1 0 3 1
#> Duster 360 14.3 8 360 245 3.21 3.570 15.84 0 0 3 4
Created on 2023-01-21 with reprex v2.0.2