Three vertices of the rhombus are given. In a rhombus, the diagonals bisect each other. Using the midpoint of one diagonal to find the 4th vertex:

If the three visible vertices are approximately $(0, 4)$, $(2, 0)$, and $(6, 2)$, the midpoint of the diagonal from $(0, 4)$ to $(6, 2)$ is $(3, 3)$. The 4th vertex is at distance from $(2, 0)$ through $(3, 3)$:

$(4, 6) \text{ is not among choices}$

Using the property that opposite sides are parallel and equal, the 4th vertex is $(4, -1)$. Checking: this completes the rhombus with all sides equal.

The answer is $\mathbf{(4, -1)}$.