  We numerically show that extreme events induced by parameter mismatches or
noise in coupled oscillatory systems can be anticipated and suppressed before
they actually occur. We show this in a main system unidirectionally coupled to
an auxiliary system subject to a negative delayed feedback. Each system
consists of two electronic oscillators coupled in a master-slave configuration.
Extreme events are observed in this coupled system as large and sporadic
desynchronization events. Under certain conditions, the auxiliary system can
predict the dynamics of the main system. We use this to efficiently suppress
the extreme events by applying a direct corrective reset to the main system.
