How do I disable or turn off Burst Mode photos in iPhone 6s? Whenever I use the self-timer modes (either 3s, or 10s), my iPhone takes a burst of photos no matter what. Is there a way to disable this?
Enabling the flash is one way to disable burst photos in Timer mode. You can also force HDR On.

I much prefer enabling HDR for this purpose, as it often yields better photos anyway. LED flash can drastically alter your scene in ways that may not be pleasing at all.