mazal,
since I can’t put links here is halachipedia
The Ashkenazic custom is not to get married during the three weeks. [16] Among Sephardim, some have just the custom not to get married during the nine days (from Rosh Chodesh Av until Tisha BeAv) [17] and some have the custom not to get married the entire three weeks. [18]
17 Shulchan Aruch 551:2, based on gemara Yevamot 43b, Yalkut Yosef (Moadim, 5748 edition, pg 554, Chazon Ovadyah (Arba Taaniyot pg 140), Sh”t Yabia Omer OC 6:43, Sh”t Yechave Daat 1:36, Sh”t Or Litzion 3:25:1
from binyanhaolam.org
Differences Between Ashkenazi and Sephardi Custom
There are a number of customs during the three weeks like like getting married, dancing, listening to music, haircuts, making the blessing of Shehechiyanu, etc. However, on a very fundamental level there is a difference of custom between Ashkenazi and Sefardi Jewry. Ashkenazim refrain from all of these practices starting from the 17th of Tammuz4). Sephardim do not refrain from any of them from the 17th of Tammuz5), rather they begin to refrain from certain things starting at Rosh Chodesh Av and certain things only during the week in which the 9th of Av falls out. We will discuss the exact details of the Sephardi custom ahead when we talk about the customs of the Nine Days.