Test Scenario:- A test scenario is almost like a story like example "a user enters into the application from login window by entering valid user name and password. After entering he will click on module Payslip and clicks on latest payslip feature to view his latest payslip". Any test scenario will contain a specific goal.
Test Suite:- A collection of tests used to validate the behavior of a product. The scope of a Test Suite varies from organization to organization. There may be several Test Suites for a particular product for example. In most cases however a Test Suite is a high level concept grouping together hundreds or thousands of tests related by what they are intended to test.