That is a lot of foliage for a small pot in full sun. The plant cools itself by pulling water from the soil and releasing it through the leaves.

Your plant has a lot of leaves and small soil profile from which to pull water. A larger pot will help

did you take it from a shady nursery ... and slam it into full blinding sun which is also reflected by a blinding white wall ...

when you buy a new plant.. you need to HARDEN IT OFF to new sunlight .... so i suspect transport shock ...

and i agree.. the pot itself.. at a min.. needs to be shaded ... never forget.. you can have a pot in full shade.. and the plant in sun ...

the black pot itself.. can heat ridiculously in sun ... and it will.. for lack of a better term.. bake off the water.. before the plant can use it ...

i would move it to full but bright shade for a while.. and maintain perfect water ...

i jsut came fromt eh garden clinic forumn.. so my answer is in that flavor ... lol .. but ....

we still dont have an Id.. but if it end up a houseplant.. there is a good forum for such ...

ken

ps: looks like fresh media.. did you transplant it .. and then throw it out in full sun.. add transplant shock ... always give a repotted plant.. a week or two.. to get the roots pumping.. before you take it back into full sun ....

One possibility is a Cotoneaster. As others have said the pot is far too small. If you look at the girth of that main stem you can see that it is a fairly mature plant. Most Cotoneasters can get quite large. Some are small trees.