Yes. There is a 20-second timer for each statement on the Clifton StrengthsFinder assessment. However, it can be turned off if you have a disability that requires you to take the Clifton StrengthsFinder assessment without a time limit.
If this is the case, please use your access code to set up a username and password for an account, then contact StrengthsQuestHelp@gallup.com.
Note that the 20-second time limit and your unfamiliarity with the statements ensure your assessment's accuracy by making it difficult to over-think your responses.