29In this connection, the Court has already held that there are very specific situations in which, despite the fact that the secondary law on the right of residence of third-country nationals does not apply and the Union citizen concerned has not made use of his freedom of movement, a right of residence must nevertheless be granted to a third-country national who is a family member of his since the effectiveness of citizenship of the Union would otherwise be undermined, if, as a consequence of refusal of such a right, that citizen would be obliged in practice to leave the territory of the European Union as a whole, thus denying him the genuine enjoyment of the substance of the rights conferred by virtue of his status (see, to this effect, judgments of 8 March 2011, Ruiz Zambrano, C‑34/09, EU:C:2011:124, paragraphs 43 and 44; of 15 November 2011, Dereci and Others, C‑256/11, EU:C:2011:734, paragraphs 66 and 67; of 8 November 2012, Iida, C‑40/11, EU:C:2012:691, paragraph 71; of 8 May 2013, Ymeraga and Others, C‑87/12, EU:C:2013:291, paragraph 36; and of 10 October 2013, Alokpa and Moudoulou, C‑86/12, EU:C:2013:645, paragraph 32).
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