Would be good if you could show a photo. But it does seem like it was cold damaged. No doubt you mean 50 fahrenheit, that's about 10C which is very cold for a Tamarind. But surprising that the top started to grow again. It's usually the thinnest part and the most susceptible to cold. All the same, I'd be inclined to cut the 'dead' part of the trunk off and just let it grow from the bottom. From how you describe it I can only see the top weakening over time and probably dying off anyway. Good luck with it, although it looks like you'd do well with it anyway if you reduce that exposure to cold a bit.

I'll try to get some pictures up tomorrow, see I originally thought it was the cold, and still kinda do. However, it is supposed to be hardy to zones 9A and up, in which I'm on the line of 9A and 9B climates. I've found them growing good in people's yards and even a few that are wild on Galveston Island, TX. I have two plants, so I'll do a test run of cutting off the top on the weaker one. Just terrified I'll lose them. I'll hopefully be moving to the Hollywood region of Florida in a year or two so I'm trying to stock up on tropicals. 3 kinds of guava, 2 kinds of mango, tamarind, royal poinciana, rainbow eucalyptus, jamaican hibiscus, jackfruit trees, several different breeds of papayas, so far at 7 different species of fruiting Passiflora (and still collecting those), 2 kinds of grapes, soursop, and many more. Anyways, thank you for your advice.

I didn't realise they could take that much cold. If there are some growing wild you should be able to collect seed, they seem to germinate readily enough. I have seedlings coming up under my trees.

So true, I've learned that, in my experience, almost any sort of tree in the Fabaceae family is easy to grow from seed. I've got little mimosa trees, pride of barbados, and yellow birds of paradise (Caesalpinia gilliesii) popping up all under my parent plants. I've tried growing tamarinds from the seed of those 20 for $4 packs at the cheap stores but no luck, probably because they were old fruits.

Here is the little tamarind(s), they grew up as two trees from one seed the guy told me. Excuse the little pineapple photobombing it haha

You can see that it grows VERY well at the bottom, some new growth at the top, but nothing there in the middle.

I've never seen Tamarind seeds for sale. A friend wants some plants but whenever I try to pot up seedlings from under the trees they end up dying. So I'm going to wait until the fruits ripen enough and use seeds from them. I think the roots are too sensitive, especially now as it's the dry season.

Your plant looks okay, although the photo isn't all that clear. Give it more time and it should fill out. Some of the seedlings in the shade of my trees are a bit miss-shapened. They're very slow growing so changes don't come fast.

They're considered a naturalised plant here and not a native. They are believed to have been brought in by Maccassan fishermen hundreds of years before the first European explorers arrived.

My tamarindo tree I have it for 3 years and it's only about 24 inches tall what am I doing wrong help

You'll need to say what you're doing before people can answer whether it's right or wrong.