Interrupting Nested Lists in LaTeX

Question

How do I interrupt and resume nested lists at any level in LaTeX? Something like

I. Item Level 1
    A. Item Level 2
        1. Item Level 3
comment at level 1
        2. Item Level 3
    B. Item Level 2
        1. Item Level 3
    comment at level 2
comment at level 1
        2. Item Level 3
II. Item Level 1

(A similar question was asked and answered for non-nested lists: https://stackoverflow.com/questions/1348194/how-to-interrupt-resume-a-list-in-latex)

Answer 1

To continue the innermost list you can use an empty item in the second level to avoid error. Continuing the enumeration in the inner list does not seem to work, so that must be done manually.

\documentclass{article}
\usepackage{enumitem}
\begin{document}

\newcounter{tempcounter}

\begin{enumerate}
    \item Item Level 1
    \begin{enumerate}
        \item Item Level 2
        \begin{enumerate}
            \item Item level 3
            \setcounter{tempcounter}{\value{enumiii}}
        \end{enumerate}
    \end{enumerate}
    \item[] Comment at level 1
    \begin{enumerate}[resume]
        \item[]
        \begin{enumerate}
            \setcounter{enumiii}{\value{tempcounter}}
            \item Item Level 3
        \end{enumerate}
        \item etc.
    \end{enumerate}
\end{enumerate}

\end{document}

Note that there is no clear way to align the comment with the label of the first-level list, since the labels are right-aligned.