How do I start my Samsung Galaxy Note 3 in safe mode?

When the Lock screen is displayed Safe mode is displayed in the lower-left corner of the screen.

To exit Safe mode restart your device

If your device is working properly in Safe mode uninstall third-party applications or app updates using the Application manager.

To access the app, from the Home screen touch Menu   > Settings  > General  > Application manager 

If necessary touch the DOWNLOADED tab. Touch an application in the list. Touch Uninstall > OK. Applications preloaded on your device cannot be uninstalled, but you can uninstall any updates you have applied by touching Uninstall updates > OK.