Raising an exception with the term "StopTest" in it will make sure test is stopped, but "TearDown" and rest of suite is executed.

script
given page	MySuite	with content	!path lib/*.jar !define TEST_SYSTEM {slim}
given page	MySuite.TestPageA	with content	| import | | fitnesse.slim.test | | constructor throws | stop test | | table never to be executed |
given page	MySuite.TestPageB	with content	| import | | fitnesse.slim.test | | script | echo script | | check | echo | hello | hello |
given page	MySuite.TearDown	with content	| import | | fitnesse.slim.test | | script | echo script | | check | echo | tear down after ${PAGE_NAME} | tear down after ${PAGE_NAME} |
given page	MySuite.SuiteTearDown	with content	| import | | fitnesse.slim.test | | script | echo script | | check | echo | suite tear down executed | suite tear down executed |
test results for suite	MySuite	should contain	table never to be executed <span class="ignore">Test not run</span>
ensure	content contains	<span class="pass">tear down after <a href="MySuite.TestPageA">TestPageA</a></span>
ensure	content contains	<span class="pass">echo script</span>
ensure	content contains	<span class="pass">tear down after <a href="MySuite.TestPageB">TestPageB</a></span>
ensure	content contains	<span class="pass">suite tear down executed</span>