How to export an individual bookmark folder in Google Chrome?

Create a new user in Chrome, then drag your desired bookmarks to the bookmarks of the new user (make sure you enabled bookmarks bars being shown for two users).

Next, export bookmarks from the new user. Voilà!

It doesn't seem possible by now. You can export all of your bookmarks then edit with a text editor and delete unwanted. If you temporarily seperate your bookmarks into groups before it's easier to do.

Move the folder you want to export to the left end of the bookmark bar. Export all bookmarks to file. Open the file in notepad. Find the bookmark that appears last in the folder you are trying to export. Delete everything after that bookmark. Save the file.