we recently moved to our new property and want to check if this plant has got some disease .
do we need to cut or trim?
Would it be good to retain?
That looks to be a Japanese weeping Maple that isn't particularly happy as it appears to have quite a few dead branches. They are deciduous and will lose their leaves around this time of year. However, those dead branches are slightly concerning. Since you've just moved to the property, it is a bit hard to diagnose what exactly is going on. You can trim back the dead branches, and hopefully, it will bud again next Spring.
Japanese maples will often get small branches dying back if they have become too dry or been subjected to too much heat.
As @MitchellMc they will be losing their leaves at this time of year anyway so can get a wee bit confusing.
They do like a cooler position and if you're in a warmer zone keep the roots cool with a heavy layer of mulch and make sure they have good moisture during hot periods. Eve in the right temperature zones it's best that you don't let them ever get too dry.
Just trim off those dead branches and see how it goes come spring.
Yes, I agree with both Mitchell and Adam_W - wait until all the leaves have dropped then cut off the dead pieces in winter. They will be easy to identify because they are white/grey while healthy branches will be brown-red. An application of a controlled release fertiliser in late winter/early spring and a layer of mulch approx 10cm deep over the roots should see it pick up next growing season.
Thank you @Adam_W for your response. I will trim the leaves and see how it goes . Fingers crossed 😊