Hi @Ria 

You can add one more condition on field of Business rule so that not to run for particular catalog item

in property you can store the sysid of  catalog item then add the condition so that it wont run that Business rule for those catalog task belongs to the that item

condition - current.state.changes() && (current.state == 3 || current.state ==7) && current.request_item.cat_item !=gs.getProperty('catalog_item_id')

If my answer helped you in any way, please then mark it as helpful or correct.

Thanks,

BK