Derek Fisher's Wife -- He Blindsided Me with Divorce

Derek Fisher's wife says she was completely "blindsided" when the NBA legend served her with divorce papers last month ... and was even more shocked that he moved all of his stuff out of their home in the middle of the night ... this according to court docs obtained by TMZ Sports.

As we previously reported ... Derek filed divorce docs in L.A. on March 18th ... one month after they celebrated their 10th anniversary.

Now, Candace Fisher has filed court docs of her own -- telling a shocking tale of a husband that not only surprised her by bailing on the marriage ... but freezing her out of his life almost immediately.

According to the docs, Candace says Derek refused to answer her calls and texts for nearly two weeks ... and even blew off their kids for several days.

Candace says she finally went to their NY apartment the week of March 30th ... only to find that all of Derek's clothing, personal items and computers had already been removed from the home.

There's more ... Candace also says Derek now wants to keep their 8-year-old twin boys in NY to live and attend school -- despite the fact she says all of their family, friends and schoolmates are in L.A.