You should apply now, because you may not have time. If your child is under 21 at the time of filing the I-140 (Immigrant Petition for Alien Workers), then he or she will qualifies as a child. But before this form, you must file a PERM Labor Certification (which is usually approved within a year). I recently learned this myself from an article on the eb3.work website: How the CSPA Works for Children of EB-3 Applicants . Therefore, you should start this visa process now, so that it is not too late.

I have been thinking about applying for an EB-3 visa and moving my family to the U.S. for about a month now. My child is 19 years old, is it still possible to get a visa so she can also get residency?