From the below image, What does the 3 above the three quarter notes represent? I attempted to look it up here but I did not find anything similar to it.
I am assuming it makes the 3 notes shorter, due to the fact that if you add together the three ♪, the 8th rest, and the three ♩ you get a total of 1¼. But I would like a detailed explanation of what I should be doing when I play it.