Nikon D3300 Reference Manual page 119

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The Camera Shutter-Release Button/Other Remote Control Devices
If an ML-L3 remote release mode is selected and the shutter is released
by any means other than an ML-L3 remote control (for example, the
camera shutter-release button or the shutter button on an optional
remote cord or wireless remote controller), the camera will function in
single-frame release mode.
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Exiting Remote Control Mode
Remote control mode is cancelled automatically if no photograph is
taken before the time selected for Remote on duration (ML-L3)
option in the setup menu (0 247). Remote control mode will also be
cancelled if the camera is turned off or shooting options are reset using
Reset shooting menu.
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Using the Built-in Flash
Before taking a photograph with the flash in manual pop-up modes
(0 91), press the M (Y) button to raise the flash and wait for the M
indicator to be displayed in the viewfinder (0 31). Shooting will be
interrupted if the flash is raised after the shutter-release button on the
ML-L3 is pressed. If the flash is required, the camera will only respond
to the ML-L3 shutter-release button once the flash has charged. In
auto pop-up modes, the flash will begin charging when a remote
control mode is selected; once the flash is charged, it will automatically
pop up and fire when required.
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Wireless Remote Controllers
Remote control is also available with various combinations of WR-R10,
WR-T10, and WR-1 wireless remote controllers (0 308), when the
shutter-release buttons on the wireless remote controllers perform the
same functions as the camera shutter-release button. For more
information, see the manual provided with the remote controllers.
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