I would set all three on one side. One centered, and the 2 about 3' in from the end.

2 on one side and 1 opposite can look nice also as you prefer.

The plumbing must be configured in a loop to provide even water flow to each jet no matter what the layout.

Thank you for the feedback. What do you mean by a LOOP?

For deck jet inspiration, see the photos on Barrington Pools website Pool Gallery. Here's a beautiful rectangular pool in the picture below with deck jets in the corners.

Photo Credit: Barrington Pools

For looped plumbing, all the jets have to be connected with a common pipe -pretty much a circle. Within that circle, the main supply from the pool equipment must "tie in" to that circle in 2 points equidistant to provide the same amount of water supply to each jet. If this is not done, one or more of the jets will have less flow.

We follow this concept for spa jets on new construction.

It gets challenging with an odd number of deck jets not placed together. Perhaps consider 4 jets -2 on either side or have the 3 jets on the one side.

Still another option is to run individual lines to each jet and have valves at the equipment on all 3 to regulate and balance. A main valve before the 3 valve manifold allows you to shut them all off. That way your not re-balancing each jet when you want them to function.

Do you have a picture of the end result? We are in the middle of our installation and your pool and layout is nearly identical. Found your post when we were determining where to place the deck jets