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Iamgold Files Ni 43-101 Technical Report FOR Previously Announced Saramacca Resource Estimate

Resource Estimates Technical Reports (NI 43-101)

IAMGOLD FILES NI 43-101 TECHNICAL REPORT FOR PREVIOUSLY

ANNOUNCED SARAMACCA RESOURCE ESTIMATE

Toronto, Ontario, October 17, 2017 – IAMGOLD Corporation (“IAMGOLD” or the “Company”)

announced that today the Company filed a National Instrument 43-101 (“NI 43-101”) Technical Report

supporting the initial resource estimate for the Saramacca deposit in Suriname, reported in the

Company’s news release dated September 5, 2017.

The NI 43-101 Technical Report was prepared by Mr. Glen Cole, P.Geo., Principal Resource Geologist,

Dr. Oy Leuangthong, P.Eng., Principal Geostatistician and Mr. Dominic Chartier, P.Geo., Senior

Geologist, all of whom are with SRK Consulting (Canada) Inc. Mr. Cole, Dr. Leuangthong and Mr.

Chartier are Qualified Persons as defined by NI 43-101. This news release was reviewed and approved

by Craig MacDougall, P.Geo., Senior Vice President, Exploration for IAMGOLD. Mr. MacDougall is a

Qualified Person as defined by NI 43-101.

The NI 43-101 Technical Report may be found on the Company's website at www.iamgold.com or under

the Company's profile at www.sedar.com and www.sec.gov/edgar.shtml.

About IAMGOLD

IAMGOLD (www.iamgold.com) is a mid-tier mining company with four operating gold mines on three

continents. A solid base of strategic assets in North and South America and West Africa is complemented

by development and exploration projects and continued assessment of accretive acquisition

opportunities. IAMGOLD is in a strong financial position with extensive management and operational

expertise.

For further information please contact:

Ken Chernin, VP Investor Relations

Tel: (416) 360-4743 Mobile: (416) 388-6883

Laura Young, Director Investor Relations

Tel: (416) 933-4952 Mobile: (416) 670-3815

Shae Frosst, Investor Relations Associate

Tel: (416) 933-4738 Mobile: (647) 967-9942

IAMGOLD Corporation Toll-free: 1 888 464-9999 [email protected]

Please note:

This entire news release may be accessed via fax, e -mail, IAMGOLD's website at www.iamgold.com and through CNW Group’s

website at www.newswire.ca. All material information on IAMGOLD can be found at www.sedar.com or at www.sec.gov.

Si vous désirez obtenir la version française de ce communiqué, veuillez consulter le

http://www.iamgold.com/French/accueil/default.aspx

TSX: IMG NYSE: IAG

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