Yesterday, Binance detected a disk failure and decided to gracefully shutdown mainly to prevent any data loss or corruption. They also announced that the maintenance will take place for 3 hours that started at 2019/06/07 20:00 (UTC).
During the maintenance period, Binance exchange will suspended deposits, withdrawals, and trading. Also announced that deposits that are not completed before the start of the maintenance will be processed after the completion of the maintenance.
After an hour, the exchange came with announcing that the maintenance is complete. In fact they completed the maintenance process much ahead of estimated time.
The exchange also announced to resume trading services at 2019/06/07 22:15 (UTC). During this time period Binance exchange allowed the users to cancel orders, process deposits and withdrawals, and use all other account-related functions.