Final answer:
Nigeria, Lesotho, and Swaziland are countries not part of the SADC region.
Explanation:
The countries that do not belong to the Southern Africa Development Community (SADC) include:
These countries are part of other African organizations such as the Economic Community of West African States (ECOWAS) and are not part of the SADC region.
Learn more about Countries not belonging to the SADC region here:
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