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Iamgold Files Ni 43-101 Technical Report FOR Previously Announced Initial Resource Estimate at the Nelligan GOLD Project

Resource Estimates Technical Reports (NI 43-101)

NEWS RELEASE

TSX: IMG NYSE: IAG

IAMGOLD FILES NI 43-101 TECHNICAL REPORT FOR PREVIOUSLY ANNOUNCED

INITIAL RESOURCE ESTIMATE AT THE NELLIGAN GOLD PROJECT

Toronto, Ontario, December 4, 2019 – IAMGOLD Corporation (“IAMGOLD” or the “Company”)

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

101”) supporting the initial Mineral Resource estimate for the Nelligan Gold Project, located in Quebec,

reported in the Company’s news release dated October 22, 2019.

The NI 43-101 was prepared by Mr. Alain Carrier, P. Geo., Mr. Vincent Nadeau-Benoit, P. Geo., and Mr.

Stéphane Faure, PhD, P.Geo., consultants from InnovExplo, all of whom are independent qualified

persons under NI 43-101. The NI 43-101 can 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:

Indi Gopinathan, Investor Relations Lead, IAMGOLD Corporation

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

Martin Dumont, Senior Analyst Investor Relations, IAMGOLD Corporation

Tel: (416) 933-5783 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 Newsfile’s website

at www.newsfilecorp.com. 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