Small Business Health Relief Act of 2013 - Repeals provisions of the Internal Revenue Code (IRC), as added by the Patient Protection and Affordable Care Act (PPACA), that: (1) impose fines on large employers (those with more than 50 full-time employees) who fail to offer their full-time employees the opportunity to enroll in minimum essential health insurance coverage, and (2) require such large employers to file a report with the Secretary of the Treasury on health insurance coverage provided to their full-time employees.

Repeals provisions of PPACA that: (1) set limits on the annual deductible on health plans offered in the small group market, (2) allow catastrophic plans to be offered in the individual market to individuals under the age of 30, and (3) impose an annual fee on health insurance entities.

Deems high deductible health plans to meet essential health benefits coverage requirements if the enrollee has established a health savings account.

Amends the Public Health Service Act, as amended by PPACA, to repeal the allowance of a premium rate variance by age in the individual or small group market.

Repeals restrictions on payments for medications from health savings accounts, medical savings accounts, and health flexible spending arrangements.

Repeals the limitation to $2,500 of annual salary reduction contributions by an employee to a health flexible spending arrangement under a cafeteria plan.

Allows a health plan to maintain its status as a grandfathered health plan regardless of any modification to the cost-sharing levels, employer contribution rates, or covered benefits. Requires the Secretary of Health and Human Services (HHS) to promulgate regulations to clarify the application of such allowance. Makes this allowance effective as if included in PPACA. Voids any regulations promulgated pursuant to current related provisions before enactment of this Act.