\input{umtest-preamble}
\usepackage{unicode-math}
\usepackage{delarray}
\setmathfont{Cambria Math}
\begin{document}
\[
\begin{array}[t]({c}) 1\\2\\3 \end{array}
\begin{array}[c]({c}) 1\\2\\3 \end{array}
\begin{array}[b]({c}) 1\\2\\3 \end{array}
\]
\end{document}
