SUPPLEMENT TO THE CURRENTLY EFFECTIVE STATEMENT OF ADDITIONAL INFORMATION

Deutsche Global Growth Fund

Class T

Effective on or about October 1, 2017, the Statement of Additional Information is supplemented as follows:

Deutsche Global Growth Fund will be renamed Deutsche International Growth Fund. All references in the Statement of Additional Information to Deutsche Global Growth Fund will be replaced with Deutsche International Growth Fund.

The following non-fundamental investment policy is added under the sub-section “Other Investment Policies” in the “INVESTMENT RESTRICTIONS” section of the fund’s Statement of Additional Information Part I:

(13) the fund will generally invest in at least three different countries excluding the United States.

The following information replaces the existing similar disclosure relating to the fund in the “PART I: APPENDIX I-E — SERVICE PROVIDER COMPENSATION” section of the fund’s Statement of Additional Information:

Effective October 1, 2017, the fund pays the Advisor a management fee, calculated daily and paid monthly, at the annual rate of 0.62% of the fund’s average daily net assets.

The Advisor has contractually agreed for the period beginning October 1, 2017 through September 30, 2018 to waive its fees and/or reimburse fund expenses to the extent necessary to maintain the fund’s total annual operating expenses (excluding certain expenses such as extraordinary expenses, taxes, brokerage and interest expenses) at a ratio no higher than 1.27% for Class T shares. The agreement may only be terminated with the consent of the fund’s Board.

The following changes will be made to “PART I: APPENDIX I-I — INVESTMENTS, PRACTICES AND TECHNIQUES, AND RISKS” in the fund’s Statement of Additional Information:

“IPO Risk” is hereby deleted.

“Yields and Ratings” is hereby added.

The following replaces similar information relating to the fund under the “PART II: APPENDIX II-C — FEE RATES OF SERVICE PROVIDERS” section of the fund’s Statement of Additional Information:

Fund Name	Management Fee Rate
Deutsche International Growth Fund	0.62%

Please Retain This Supplement for Future Reference

July 20, 2017

SAISTKR-359