You may change or stop your employee contributions at any time. You may restart TSP contributions at any time; there is no waiting period.
If you are covered by the Federal Employees Retirement System (FERS) and you stop your employee contributions, your agency matching contributions will also stop; however, you will continue to receive agency automatic (1%) contributions.
If you make a financial hardship withdrawal from your TSP account while still employed by the Federal Government, you cannot contribute to your TSP account for 6 months. If you are a FERS employee, you will not receive any agency matching contributions for the period during which you are not making employee contributions; however, you will continue to receive agency automatic (1%) contributions. At the end of the 6-month period, your contributions will not resume automatically; you must elect to contribute.