Hi Lissa, The strange appearance of your redbud leaf looks a lot like mosiac leaf virus. How much of your tree's canopy has leaves that look like this? Your picture seems to show some other yellow leaves in the background.

The typical symptoms of the mosaic virus include:

Yellow, white or green stripes/streaks/spots on foliage
Wrinkled, curled, or small leaves
Pronounced yellowing only of veins
Stunted growth and reduced yields
Infected fruit appears mottled and develops raised "warty" areas
Dark green blisters
Stems that dry out rapidly

There are no cures for viral diseases, such as the mosaic virus, once a plant is infected. Fungicides will not treat a viral disease.

It is difficult to diagnose diseases by looking at a picture. I certainly could be wrong, and I hope I am. Considering the seriousness of any viral disease, the best thing to do at this point for diagnosing and treating your tree is to consult a certified arborist. He or she can examine your tree and make recommendations regarding the health of the tree, any needed judicial pruning, and whether or not (in his opinion) it should be removed. Hiring a certified arborist will ensure that you are getting a knowledgeable and qualified tree specialist. You can find a certified arborist in your area here:

http://www.treesaregood.org/

Click on "Find an Arborist" at the top of the page; then click on United States from the pull-down menu. Then enter your State and City. This should bring up a list of certified arborists nearest to you. Or you may be able to locate one under "Tree Services" in your local Yellow pages.

Every tree and situation is a little different and in this case, an on-site arborist is the safest and most effective way.