The lender said the move was to protect and improve service and it hoped to have a wider choice of products available by the end of October.
Among the products being pulled are all two- and five-year fixes up to 85 per cent LTV – with the exception of its newly qualified professional five-year fixed-rate.
For buy to let, all two and three-year fixes up to 80 per cent LTV for less than £1m will be withdrawn, as well as five-year fixes at 60 and 80 per cent LTV for less than £1m.
The deals will be removed with effect from 8pm Tuesday 29 September.
There are no changes to products available to existing customers.
A spokeswoman from Clydesdale said: “We’ve temporarily reduced the range of mortgages we offer to new residential and buy-to-let customers.
“This will help us improve the service for customers and manage pipeline applications. We keep our products under constant review and we anticipate widening our mortgage range again by the end of October.”