Shipping Rules
Shipping rules are defined in “Settings -> Shipping rules”. When creating shipping rules you would need to choose to which shipping country that rule is applied, for which shipping method this rule is and what is order weight range and which price will be charged. This can help you exclude some shipping methods for specific countries by simply defining a rule for that method for another country.
Here is how it works: if there are no rules for a specific method that method will be used always unless is disabled. If there is at least one rule for that method - that method will be used according to the defined rule. If there is only one rule and it does not include the shipping country of your customer, that method will not be available.
