My shloshim ends during the Omer, can I shave and/or get a haircut at the end of my shloshim
Hamkom yinachem eschem b’toch shar aveilei tazion v’yerushalayim.
If the shloshim is for any relative besides a parent, it would be permitted for you to take a haircut or shave if there is a big need to do so. If however the aveilus is for a parent, then the aveilus regarding taking a haircut continues even after shloshim. However, if people on their own, are commenting to him that he needs a haircut then it would be permitted as far as the aveilus for a parent is concerned.
Sharei Teshuva 493-7, Birkei Yosef Kaf Hachayim 493-15,48, Divrei Sofrim 40-33, Nitei Gavriel (Aveilus Vol. 2) 6-1, Y:D 390-4.