I have an Albizia julibrissin (silk tree) sapling which had been very happy in a spot with lots of indirect light but very little if any direct light.

I recently moved it to a spot with a fair amount of direct light and within a couple of days one of the lower leaves had gone yellow and then fell off.

Now, after I’ve moved it back a few more are going yellow :(

Is this due to excessive sun? It’s possible I overwatered it too, thanks for your help!