These instructions apply to the desktop version of Gmail running on any modern web web app.

Expand the desired message if you cannot yet see it.

opt for down (More) arrow next to the Reply button in the message’s title bar.

A Gmail conversation

If you see no Replyand no arrow, selectMore Options.

SelectDelete this messagefrom the menu that appears.

Gmail with the More Options menu button highlighted

Gmail with the Delete this Message command highlighted