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IMG.TO ·

Iamgold Defers Côté Construction

Mine Development & Operations

NEWS RELEASE

TSX: IMGNYSE: IAG

IAMGOLD DEFERS CÔTÉ CONSTRUCTION

All monetary amounts are expressed in US dollars, unless otherwise indicated.

Toronto, Ontario, January 28, 2019 – IAMGOLD Corporation (“IAMGOLD” or the “Company”) today

announced its decision not to proceed with construction of the Côté Gold Project (“Côté”) in Ontario.

“We are focused on creating superior shareholder value by allocating our capital to our best near- and

long-term opportunities in a manner that is consistent with shareholder expectations , and with our goal of

maintaining a strong balance sheet. We have substantially de-risked the Côté Gold Project, from both a

technical and financial perspective, and believe in its potential to positively transform the Company.

However, we have decided to wait for improved, and sustainable, market conditions in order to proceed

with construction,” said IAMGOLD’s President and CEO, Steve Letwin.

IAMGOLD remains focused on our existing operations and on current initiatives and opportunities at

Saramacca, Rosebel, Essakane, and Westwood. The Company will continue to advance engineering and

permitting work at Côté, which it believes will add value. The Company has added value over the past

several years by:

 Identifying almost 10.0 million ounces in Measured and Indicated Resources at Côté (inclusive of

Reserves), compared with less than 1.0 million ounces at acquisition; and

 Developing a Feasiblity Study (“FS”) Base Mine Plan and a FS Extended Mine Plan with improved

net present values and internal rates of return as compared to the Prefeasiblity Study.

2019 Côté Capital Guidance

IAMGOLD will provide guidance on capital for the Côté workplan when it reports fourth quarter and full

year 2018 financial results, which will be released after market hours on February 20, 2019. For additional

clarity, the Company notes that the original guidance, which included $20 million in Corporate and

Development Projects mainly related to Côté, will be updated.

Forward Looking Statement

This news release contains forward-looking statements. All statements, other than of historical fact, that address

activities, events or developments that the Company believes, expects or anticipates will or may occur in the future

(including, without limitation, statements regarding expected, estimated or planned gold production, cash costs,

margin expansion, capital expenditures and exploration expenditures and statements regarding the estimation of

mineral resources, exploration results, potential mineralization, potential mineral resources and mineral reserves) are

forward-looking statements. Forward-looking statements are generally identifiable by use of the words “will”, “should”,

“continue”, “expect”, “anticipate”, “estimate”, “believe”, “intend”, “to earn”, “to have’, “plan” or “project” or the negative

of these words or other variations on these words or comparable terminology. Forward-looking statements are

subject to a number of risks and uncertainties, many of which are beyond the Company’s ability to control or predict,

that may cause the actual results of the Company to differ materially from those discussed in the forward-looking

statements. Factors that could cause actual results or events to differ materially from current expectations include,

among other things, without limitation, failure to meet expected, estimated or planned gold production, cash costs,

margin expansion, capital expenditures and exploration expenditures and failure to establish estimated mineral

resources, the possibility that future exploration results will not be consistent with the Company's expectations,

changes in world gold markets and other risks disclosed in IAMGOLD’s most recent Form 40-F/Annual Information

Form on file with the United States Securities and Exchange Commission and Canadian provincial securities

regulatory authorities. Any forward-looking statement speaks only as of the date on which it is made and, except as

may be required by applicable securities laws, the Company disclaims any intent or obligation to update any forward-

looking statement.

page 2 of 2

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 acq uisition

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

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.