Q. Hello Rabbi Bartfeld my name is …. I have Maiser money, and my sister is making a bris and they can use the money. Can I allocate my Maiser money toward the bris expenses?
 
A. Horav Shlomo Miller’s Shlit’a opinion is that you may allocate some Maiser money toward the bris expenses if the receivers are indeed in need.
See question 475 on ‘Paying Tuition with Maaser Money’ and questions 2418 and1783 on the definition and obligation of this Maaser.
Rabbi A. Bartfeld as advised by Horav Shlomo Miller and Horav Aharon Miller Shlit’a