On account of the heavy flooding in Mumbai, the U.S. consulate in Mumbai has rescheduled appointments originally scheduled for July 3 to July 12, 2019. If the applicant was unable to attend the biometrics on July 2, s/he can provide the biometrics on any day between July 3 and July 11 at the same timing as the original biometric appointment. 

There is no need to reschedule and the same appointment letter will be valid and should be presented to the security for entry into the consulate on July 12. This update can be found here.