A 3' pipe will not carry as much, but being perforated will dissipate some of the water. If that is what you want, and the 3' size will handle the load of the catch basin, and it & the dry well will accept 3' pipe, then my uneducated opinion is that it should work.
Perforated drain pipe used to move water away. Triple wall construction provides superior beam strength Made from corrosion and abrasion resistant high density polyethylene Drilled holes make it ideal for leach bed systems.

Pvc Slotted Pipe
3 Slotted Pipe Hangers
3 Slotted Pipe Caps

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Pvc Slotted Pipe

Slotted screens can be fabricated from the lightest class PVC to the heaviest. We can slot pipe from ½” diameter through 18″ diameter and up to 20′ lengths. Slot sizes .008 and wider are available with a variety of configurations possible depending on slot size, spacing and number of rows of slots.

3 Slotted Pipe Hangers

A row consists of slots, normally spaced at 1/8″ intervals, cut perpendicular to the axis of the pipe and running from one end of the pipe to the other. Most pipe can take up to two rows more than the stated diameter of the pipe without significant structural weakening. Screens and pipe can be furnished with flush threaded or slip joints as well as conventional fittings.

3 Slotted Pipe Caps

SCHEDULE 40 PVC

Intake Area Per Foot – .125 spacing
Pipe Size	Number of Rows	.008	.010	.012	.015	.018	.020	.025	.028	.040	.060	.125
1″	3	2.20	2.64	3.13	3.92	4.48	4.92	6.00	6.55	8.64
1¼”	3	2.20	2.64	3.13	3.92	4.48	4.92	6.00	6.55	8.64
1½”	4	2.90	3.52	4.18	5.22	5.98	6.56	8.00	8.74	11.52	15.36
2″	4	2.90	3.52	4.18	5.22	5.98	6.56	8.00	8.74	11.52	15.36	24.00
3″	6	4.30	5.30	6.26	7.83	8.96	9.84	12.00	13.10	17.28	23.04	36.00
4″	6	4.30	5.30	6.26	7.83	8.96	9.84	12.00	13.10	17.28	23.04	36.00
5″	8	7.00	8.35	10.44	11.95	13.12	16.00	17.47	23.04	30.72	48.00
6″	8	7.00	8.35	10.44	11.95	13.12	16.00	17.47	23.04	30.72	48.00
8″	8	10.44	11.95	13.12	16.00	17.47	23.04	30.72	48.00
10″	10	16.60	20.00	21.84	28.80	38.40	60.00

1″ and 1 ¼” pipe based on ¾” length of slot
Based on 1″ of opening in I.D. of pipe.
Pipe sizes ½” through 18″ can be slotted.
Specifications for other diameter pipe available from Big Foot Manufacturing.