Raising an exception with the term "StopSuite" in it will make sure all remaining tests are skipped.

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 suite | | table in page A never to be executed |
given page	MySuite.TestPageB	with content	| import | | fitnesse.slim.test | | table in page B never to be executed |
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 in page A 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	table in page B never to be executed <span class="ignore">Test not run</span>
ensure	content contains	tear down after <a href="MySuite.TestPageB">TestPageB</a> <span class="ignore">Test not run</span>
ensure	content contains	<span class="pass">suite tear down executed</span>