Kindly refer to the following link(s): 

Are Deobandis part of Ahlus Sunnah?  | By Sheikh Assim Al Hakeem (website)


https://www.assimalhakeem.net/2017/05/16/sheikh-kindly-tell-me-what-is-the-major-difference-between-deobandi-and-ahle-salaf-and-is-it-favorable-for-a-n-ahle-salaf-girl-to-marry-a-deobandi/ 


Who are the Deobandis & are they from Ahlul Sunnah wal Jamah?


Can we pray behind a Deobandi Imam?


Marry Deobandi?

If the woman is salafi with the correct aqeedah, she must not marry a man who is not on this same aqeedah