Can soldiers in civilian clothes salute a fallen comrade memorial?

Honor

Not only can a soldier (or any military person) salute when in civilian clothes, but so too can Veterans (normally) in civilian clothes. In fact, when I go attend to a funeral home to pay respects to someone, if they're a Veteran, I render a slow "funeral salute." I'm a Mason, and we have Masonic Funeral Services on request of a family of any Mason. There's a brief ceremony, then Brother Masons will approach the casket in two columns. A fellow Veteran and I will ensure we arrive together, and we render a slow "funeral salute," irrespective of Masonic traditions.
Veterans can now (and should) salute the Flag passing in any parade, and salute during the National Anthem.

Yes.

I'm an Army veteran, and I saluted my father-in-law (Navy veteran) at his funeral at Camp Nelson.

I can't imagine anyone wanting to stop a soldier or veteran from saluting a fallen comrade.

You serve you earn the right to salute.

As a veteran, I do it out of respect for the fallen.

Hell yes we can, those of us serving our country earned that right, we do not need a law to say yes or no; I will stand firm to anyone telling me, or any of my brothers, and sisters we cannot regardless of who they are. To honor our fallen, is one of the most respectful things I have witnessed in my life, I would hope others continue to do the same; many times I have place three coins upon a fallen soldiers meal table at stores, and restaurants to honor my lost brothers from war. Many stare and wonder, but those who have lost friends have in the past, followed suit.

Ask any war veteran not to salute a fallen comrade they served with. Especially one that died in front of them, or saving their own life. In a civilian sense, would you ever tell a mother she has no right to weep over her fallen child?

If you can honestly say you would tell a veteran they can not salute a fallen brother/sister in arms, please wait for me to stand clear. I don't want to get any of you on me.

Yes! Its a sign of respect! If you served especially during wartime and in combat you earned the right to salute!

Note on this subject. It's not against the law to salute at the National Anthem being played, Taps honoring the Fallen or at retreat. Even.if it were against the law, I'd still salute.