Yes, assuming the US citizen parent(s) met the conditions in US law for transmitting US citizenship to a child born abroad at the time of the childu2019s birth. If so, the child was automatically a US citizen at birth, and will always be a US citizen, unless he/she renounces it. Whether he/she has stepped foot in the US at a certain age is irrelevant.Look at DS-11, the US passport application form. The proof of citizenship section in the instructions has this part that is relevant to this childu2019s case:- If you claim citizenship through birth abroad to at least one U.S. citizen parent: Submit a ConReport of Birth (Form FS-240), Certification of Birth (Form DS-1350 or FS-545), or your foreign birth certificate (and official translation if the document is not in English), proof of U.S. citizenship of your parent, your parents' marriage certificate, and an affidavit showing all of your U.S. citizen parents' periods and places of residence/physical presence in the United States and abroad before your birth.(Emphasis added by me.) If you follow the bolded part, you just need to submit evidence proving your relationship to your parent, and evidence of your parentu2019s physical presence in the US before your birth. You donu2019t need to have a CRBA.