To solve the equation
\[ \frac{y}{3} - 9 = 11, \]
first, isolate the term that contains \(y\). Start by adding \(9\) to both sides of the equation:
\[ \frac{y}{3} = 11 + 9. \]
This simplifies to:
\[ \frac{y}{3} = 20. \]
Next, to solve for \(y\), multiply both sides by \(3\):
\[ y = 20 \times 3. \]
So,
\[ y = 60. \]
The solution is
\[ \boxed{60}. \]