3. In an isosceles right triangle $\triangle ABC$, $CA = CB = 3$, $E$ is a point on $BC$ such that $BE = 2$, and $P$ is a moving point on the hypotenuse $AB$. Then the minimum value of the sum of the lengths $PC + PE$ is ( ).
(A) $\sqrt{10}$
(B) $\sqrt{11}$
(C) $\sqrt{12}$
(D) $\sqrt{13}$
3.D.

As shown in Figure 2, construct the symmetric point $E_{1}$ of point $E$ with respect to $AB$, and connect $C E_{1}$ and $P E_{1}$. Then
$$
\begin{array}{l}
P C+P E \\
=P C+P E_{1} \geqslant C E_{1} \\
=\sqrt{B C^{2}+E_{1} B^{2}}=\sqrt{13} .
\end{array}
$$