Rabenu Shlit’a. Can one schedule surgery for and during the 3 weeks?,
A. One should not schedule surgery for during the Three Weeks, and certainly not during the Nine Days, unless the doctor insists that it should not be postponed.
See Piskei Teshuvot 551:1, Dirshu Mishna Brura 551:note 128 in the name of Rav Shmuel Vosner, Rav Moshe Feinstein quoted in Moadei Yeshurun page 130:footnote 44, Emes Liyaakov 551:footnote 515, Nitei Gavriel 23:8. Rav Bentzion Mussafi permits until Rosh Chodesh to get surgery. See also Chazon Ovadia Arba Ta'aniyot page 128 footnote 2 and Halichot Olam vol 2 pg. 134.
Rabbi A. Bartfeld as revised by Horav Y. Hirshman, Horav Dovid Pam, Horav Aharon Miller and Horav Chanoch Ehrentreu, Horav Kalman Ochs, and Horav Dovid Bartfeld consulting in need Horav Hagaon Rav Yitzchak Berkowitz Shlit’a