The statute of limitations sets a time limit within which a claim can be brought, and an amendment can typically only be made if it relates back to the original claim filed within that timeframe. An amendment that introduces a new claim or changes the original one too substantially may not be permitted if it falls outside the statutory period.
For example: If a patient initially files for breach of contract against their physician within the legal timeframe but later seeks to add a medical malpractice claim after the statute has expired, the amendment might not be accepted unless it arises out of the same conduct, transaction, or occurrence set forth in the original pleading.