Iamgold Files Final Base Shelf Prospectus

NEWS RELEASE

TSX: IMG NYSE: IAG

IAMGOLD FILES FINAL BASE SHELF PROSPECTUS

Toronto, Ontario, April 3, 2018 – IAMGOLD Corporation (“IAMGOLD” or the “Company”) today

announced it has obtained a receipt for a final short form base shelf prospectus further to its filing of a

renewed preliminary short form base shelf prospectus, previously announced on March 14, 2018. Both

documents have been filed with the securities regulators in each province and territory of Canad a, except

for the Province of Quebec, and a corresponding registration statement with the United States Securities

and Exchange Commission. These filings will allow the Company to make offerings of common shares,

first preference shares, second preference shares, debt securities, warrants, subscription receipts or any

combination thereof of up to US$1 billion during the next 25 months in the United States and Canada,

except for the Province of Quebec. The net proceeds from any such offerings may be used by the

Company to fund on-going operations and/or capital requirements, reduce the level of indebtedness

outstanding from time to time, fund capital programs, potential future acquisitions and for general

corporate purposes. The Company filed this final base shelf prospectus to maintain financial flexibility but

has no immediate intention to undertake an offering.

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, IAMGOLD Corporation

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

Laura Young, Director Investor Relations, IAMGOLD Corporation

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

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 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.