Run Individual Test from Nunit3-console.exe
You want to look at the --where command line option to run individual tests or filter your tests. It is new for NUnit 3. The --where option uses the test selection language which is a little bit like SQL for tests.
nunit-console --where "method =~ /Source.*Test/ && class =~ 'My.Namespace.Classname'" test.dllFor simple filters, you can also use the --test=NAMES option with a simple list of test names separated by commas.
nunit3-console.exe --test=namespace.class.method test.dllWith TestCase and other data driven tests, the test name for individual tests can be difficult to determine. If that is the case, you can use the --explore option.