Respected Sir,
A 'sapinda relationship' as defined under the Hindu Marriage Act, 1955 with reference to any person extends as far as the third generation (inclusive)in the line of ascent through the mother, and the fifth (inclusive) in the line of ascent through the father, the line being traced upwards in each case from the person concerned, who is to be counted as the first generation;
ii two persons are said to be "sapindas" of each other if one is a lineal ascendant of the other within the limits of sapinda relationship, or if they have a common lineal ascendant who is within the limits of sapinda relationship with reference to each of the;
Sir, two people who are each other sapindas cannot marry each other under Hindu Marriage Act. In plain words, a person can not marry up to his second cousin from the mother's side and up to his fourth cousin from the side of the father. It is also necessary the parties should not be sapindas of each other from either side.
So if you do not share a sapinda relationship with her then you can marry her under Hindu Marriage Act.
However, as you said you both belong to different countries so your marriage will be validated according to the rules of the place where you both marry or which have jurisdiction over your marriage.
Regards
Arpita Chauhan