In three years, not without significantly more government intervention than we're seeing (especially from the USA - which is the number 2 emitter of CO2, and number one if you attribute to them all the CO2 in China that is emitted in processes for American companies). I doubt we can make that target. It's not longer a case of preventing the disasters, that ship has sailed, all that we can still do is to reduce the scale of what happens. Not enough to save every life that will be lost (some have died already), not enough to prevent several countries from flooding, or a stream of refugees. 
But perhaps enough to keep those refugees at numbers that won't actually trigger a world war.