Answer
Left shift of $\frac{\pi}{3}$
See below
Work Step by Step
We know that
If H is any real number, then the graphs of $y = A\sin(x + H)$ and $y = A\cos (x + H)$ will have
$Horizontal\ shift = -H$, Positive means right shift, and negative meaning a left shift
so for $y = \sin (x + \frac{\pi}{3})$
$Horizontal\ shift = -\frac{\pi}{3}$
i.e Left shift of $\frac{\pi}{3}$