40However, a refusal to grant a right of residence to a third-country national is liable to undermine the effectiveness of Union citizenship only if there exists, between that third-country national and the Union citizen who is a family member, a relationship of dependency of such a nature that it would lead to the Union citizen being compelled to accompany the third-country national concerned and to leave the territory of the European Union as a whole (judgment of 8 May 2018, K.A. and Others (Family reunification in Belgium), C‑82/16, EU:C:2018:308, paragraph 52 and the case-law cited).
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