Background Note: According to Ashkenazi practice, one generally does not shave (or get a haircut, or trim) during the “3 Weeks”, that is, from the Fast of 17 Tammuz until after the Fast of 9 Av. However, in some cases allowance may be made for extenuating circumstances.
Dear Rabbi Simon
I have a few important meetings at my (long-awaited) new job this week. I was wondering if it would be permissible just to trim/shave but not have a haircut. I didn’t manage to accomplish this before the beginning of the 3 weeks and the beard is quite disruptive.
Thank you for your question. The restrictions against shaving are more severe once the month of Av begins (ie, the so-called Nine Days starting with Rosh Hodesh Av, which is this coming Friday). Therefore, under the circumstances, you may trim and shave in advance of your meetings this week.
Rabbi Rashi Simon