National scholarships and fellowships that receive US federal funding (e.g. NSF Graduate Research Fellowships) will typically require US citizenship. Other national scholarship and fellowship foundations (e.g. the Marshall Scholarships) may have US citizenship as part of their mission or eligibility requirements, although many foundations extend their eligiblity to permanent residents, DACA students, or to undocumented students more broadly.
ONSF is committed to providing inclusive opportunities for all of our U-M students. On each scholarship or fellowship page on the ONSF website you'll find the citizenship eligibility highlighted. Below you will find links to a selection of options for undocumented students. You may also wish to consult the page for international students since many of those programs tend to have broader citizenship criteria. Broader support resources can be found at https://undocumented.umich.edu/.