Give four reasons for restricting international trade?

Two main reasons are

1. In certain cases goods from a foreign country could be cheaper than the one produced in the same country. In such cases to sustain local business and production the country may restrict international trade

2. In certain cases the market for some goods may be very good outside the country and hence manufacturers opt only to sell them to other countries and because of this the local market faces a shortage of those items. In such cases international trade may be restricted.