 Hello everyone. I bought an all time thai mango plant(grafted) from a local nursery in the month of may and after keeping it under shade for a week or two, I tried keeping it under direct sunlight but it got sunburnt so I had to shift it back under shade (by shade I mean under the shade of solar panels but there is ample air passing through and indirect sunlight is also good).

Now I thought that once the monsoon goes away, I'll shift the pot under direct sunlight to harden its leaves and just so that it can acclimate itself to the temperature. 

Last month, the plant showed new growth and roughly 4-5 new whorls of leaves grew on it and there was this sudden dry spell in the season so I thought that monsoon is done and it's a good time for the shifting. Due to sudden rain, the soil collected quite a bit of water and it's been like 2-3 weeks, I have not watered the plant because the soil is consistently moist to touch(even 12 cm below the top layer). But the leaves suddenly started drying up, even though they still looked kinda green (mehndi green colour), they felt paper like in texture and almost all of them fell off. Now there are hardly ten leaves left on the plant and they are also paper-like in texture but still pretty firmly attached to the plant. 

Please help me find out what's wrong and how I can still help recover it. It would be a huge favour on me. 

Location: Rajasthan 

Please help me with my grafted thai mango plant diagnosis.