Unlike Arab countries, the expats voters turnout in Europe, Africa, Australia and the Americas was low at 55 percent. The overall turnout was 59%

I didn’t find any official turnout reports but these are the ones I gathered online from [Annahar], [lebanese-Forces] and [lebanonfiles]:

South Africa: 52%
Gabon: 57%
Congo: 49.6%
Nigeria: 60%
Benin: 78.3%
Ivory Coast: 70.4%
Liberia: 63%
Sierra Leone: 41.9%
Senegal: 67.3%
Guinea: 60.6%
Gana: 66.4%

Romania: 70.74%
Greece: 62.5%
Netherlands: 52.1%
Denmark: 55.6%
Sweden: 60.1%
Belgium: 75.5%
Switzerland: 49.6%
Spain: 30.5%
Italy: 53.4%
UK: 52.6%
France: 54%
Germany: 46.16%

Mexico: 35.61%
USA: 44.04%
Canada: 34.66%
Australia: 58%
Latin America: 48%