Visa applying country different from the departure country

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I am citizen of India planning to apply for a visa to a Hong Kong/South Korea from country Saudi Arabia (being its resident).
After receiving the visa (after checking the nationality and permissibility of my travel to Hong Kong/South Korea) from Saudi Arabia, can I travel from India (home country) to Hong Kong/South Korea?
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ARGO: Can you apply for your U.S. visa outside of your home country? | Third Country National (TCN)
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