Iamgold Changes Date FOR Announcing

NEWS RELEASE

TSX: IMG NYSE: IAG

IAMGOLD CHANGES DATE FOR ANNOUNCING

FIRST QUARTER 2018 RESULTS TO MAY 7th, 2018

Toronto, Ontario, April 25, 2018 – To allow for a more comprehensive discussion during the 2018

Annual General Meeting on Tuesday, May 8th at 4:00 PM, IAMGOLD Corporation (“IAMGOLD” or the

“Company”) has changed the date for announcing its first quarter 2018 financial results to after-market

hours on Monday, May 7th, 2018, from the previously announced Tuesday, May 8th, 2018.

CONFERENCE CALL

The conference call will now be held on Tuesday, May 8th, 2018 at 7:00 a.m. (Eastern Time) for a

discussion with management regarding the Company’s operating performance and financial results for

the first quarter 2018. A webcast of the conference call will be available through the Company’s website

at www.iamgold.com.

Conference Call Information:

North America Toll-Free: 1-800-319-4610 or International number: 1-604-638-5340

A replay of this conference call will be available for one month following the call by dialing:

North America toll-free: 1-800-319-6413 or International number: 1-604-638-9010, passcode: 2155#

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) 388-6883

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

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

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