UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 10-D

ASSET-BACKED ISSUER

DISTRIBUTION REPORT PURSUANT TO SECTION 13 OR 15(d) OF

THE SECURITIES EXCHANGE ACT OF 1934

For the monthly distribution period from:

June 26, 2007 to July 25, 2007

Commission File Number of issuing entity: 333-141145-07

ChaseFlex Trust Series 2007-3

(Exact name of issuing entity as specified in its charter)

Commission File Number of depositor: 333-141145

Chase Mortgage Finance Corporation

(Exact name of depositor as specified in its charter)

Chase Home Finance LLC

(Exact name of sponsor as specified in its charter)

Delaware

(State or other jurisdiction of incorporation or organization of the issuing entity)

86-1169040

(I.R.S. Employer Identification No.)

194 Wood Avenue South, Iselin, New Jersey		08830__
(Address of principal executive offices of the issuing entity)		(Zip Code)

(732) 205-0600

(Telephone number, including area code)

No Change

(Former name, former address, if changed since last report)

Registered/reporting pursuant to (check one)

Title of Class	Section 12(b)	Section 12(g)	Section 15(d)	Name of Exchange (If Section 12(b))
IA1			X
IA2			X
IA3			X
IA4			X
AP			X
AR			X
IM			X
IB1			X
IB2			X
IB3			X
IB4			X
IB5			X

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes x No o

Part I -- DISTRIBUTION INFORMATION

Item 1. Distribution and Pool Performance Information

On July 25, 2007 a distribution was made to holders of ChaseFlex Trust Series 2007-3.

The distribution report is attached as an Exhibit to this Form 10-D. Please see Item 9(a), Exhibit 99.1 for the related information.

Part II -- OTHER INFORMATION

Item 9. Exhibits

(a) The following is a list of documents filed as part of this Report on Form 10-D:

(99.1) Monthly report distributed to holders of ChaseFlex Trust Series 2007-3, relating to the July 25, 2007 distribution.

(b) The exhibits required to be filed by registrant pursuant to Item 601 of Regulation S-K are listed above and in the Exhibit Index that immediately follows the signature page hereof.

[SIGNATURE PAGE FOLLOWS]

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Chase Mortgage Finance Corporation

(Depositor)

/s/ Bruce J. Friedman

By: Bruce J. Friedman

Title: Vice President

Date: July 27, 2007

EXHIBIT INDEX

Exhibit Number		Description
EX-99.1		Monthly report distributed to holders of ChaseFlex Trust Series 2007-3, relating to the July 25, 2007 distribution.

ChaseFlex Trust Series 2007-3 10-D