Q. Shalom, Can I bring a Jewish guest to a Pesach Seder if he never had a Bris?
A. Horav Shlomo Miller's Shlit'a opinion is that it is permitted specially if the purpose is Kiruv. However, he should not eat the Afikomen that represents the Korban Pesach since it was not eaten by the uncircumcised.
Rabbi A. Bartfeld as revised by Horav Dovid Pam, Horav Aharon Miller and Horav Chanoch Ehrentreu Shlit'a