According to this article, Brenda suffered a broken left arm as a result of a car accident last Sunday in Las Terrenas, Samaná where she was vacationing with her family. A surgery is required to treat her fractured arm.
If her recovery goes well, she should be ok in 8-10 weeks and should be able to compete in NORCECA Tokyo Qualification Tournament this coming January 2020 with the national team.
On behalf of the entire volleyball community, we would like to send our well wishes to Brenda Castillo! Have a speedy recovery and hope to see you very on the volleyball court!